diff --git a/packages/shared/src/constants.ts b/packages/shared/src/constants.ts
index fb58a85b0b1..8fa504ff8d1 100644
--- a/packages/shared/src/constants.ts
+++ b/packages/shared/src/constants.ts
@@ -124,6 +124,56 @@ export const AGENT_ICON_NAMES = [
 ] as const;
 export type AgentIconName = (typeof AGENT_ICON_NAMES)[number];
 
+/**
+ * Curated Lucide icon set for projects (PAP-68 part 3).
+ *
+ * The first entry, `"folder"`, is the default for any project without an
+ * explicit icon. The remaining entries reuse much of the agent icon set plus a
+ * handful of folder/structure icons that read well at small tile sizes.
+ */
+export const PROJECT_ICON_NAMES = [
+  "folder",
+  "rocket",
+  "code",
+  "terminal",
+  "database",
+  "globe",
+  "package",
+  "boxes",
+  "box",
+  "layers",
+  "briefcase",
+  "compass",
+  "target",
+  "flame",
+  "zap",
+  "star",
+  "bug",
+  "wrench",
+  "hammer",
+  "lightbulb",
+  "sparkles",
+  "shield",
+  "lock",
+  "search",
+  "cog",
+  "brain",
+  "cpu",
+  "git-branch",
+  "file-code",
+  "puzzle",
+  "gem",
+  "atom",
+  "heart",
+  "mail",
+  "message-square",
+  "crown",
+  "radar",
+  "telescope",
+  "hexagon",
+] as const;
+export type ProjectIconName = (typeof PROJECT_ICON_NAMES)[number];
+
 export const ISSUE_STATUSES = [
   "backlog",
   "todo",
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index dcb3a3d9cea..f5cf5f84a55 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -41,6 +41,7 @@ export {
   WORKSPACE_BRANCH_ROUTINE_VARIABLE,
   MODEL_PROFILE_KEYS,
   AGENT_ICON_NAMES,
+  PROJECT_ICON_NAMES,
   ISSUE_STATUSES,
   INBOX_MINE_ISSUE_STATUSES,
   INBOX_MINE_ISSUE_STATUS_FILTER,
@@ -169,6 +170,7 @@ export {
   type AgentRole,
   type ModelProfileKey,
   type AgentIconName,
+  type ProjectIconName,
   type IssueStatus,
   type IssuePriority,
   type IssueWorkMode,
diff --git a/packages/shared/src/validators/project.ts b/packages/shared/src/validators/project.ts
index 9750d551c09..45b2d0e146d 100644
--- a/packages/shared/src/validators/project.ts
+++ b/packages/shared/src/validators/project.ts
@@ -1,5 +1,5 @@
 import { z } from "zod";
-import { PROJECT_STATUSES } from "../constants.js";
+import { PROJECT_STATUSES, PROJECT_ICON_NAMES } from "../constants.js";
 import { envConfigSchema } from "./secret.js";
 import { trustAuthorizationPolicySchema } from "./trust-policy.js";
 
@@ -107,9 +107,7 @@ const projectFields = {
   leadAgentId: z.string().uuid().optional().nullable(),
   targetDate: z.string().optional().nullable(),
   color: z.string().optional().nullable(),
-  // TODO(PAP-68 part 3): tighten to `z.enum(PROJECT_ICON_NAMES)` once the icon
-  // name enum lands. Loosely typed as a string until then.
-  icon: z.string().optional().nullable(),
+  icon: z.enum(PROJECT_ICON_NAMES).optional().nullable(),
   env: envConfigSchema.optional().nullable(),
   executionWorkspacePolicy: projectExecutionWorkspacePolicySchema.optional().nullable(),
   archivedAt: z.string().datetime().optional().nullable(),
diff --git a/ui/src/components/IssueProperties.test.tsx b/ui/src/components/IssueProperties.test.tsx
index 51e78c8596b..4ee639326bd 100644
--- a/ui/src/components/IssueProperties.test.tsx
+++ b/ui/src/components/IssueProperties.test.tsx
@@ -294,6 +294,7 @@ function createProject(overrides: Partial<Project> = {}): Project {
     leadAgentId: null,
     targetDate: null,
     color: "#6366f1",
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/src/components/ProjectIconPicker.tsx b/ui/src/components/ProjectIconPicker.tsx
new file mode 100644
index 00000000000..094319ade3d
--- /dev/null
+++ b/ui/src/components/ProjectIconPicker.tsx
@@ -0,0 +1,77 @@
+import { useState, useMemo } from "react";
+import { PROJECT_ICON_NAMES, type ProjectIconName } from "@paperclipai/shared";
+import {
+  Popover,
+  PopoverContent,
+  PopoverTrigger,
+} from "@/components/ui/popover";
+import { Input } from "@/components/ui/input";
+import { cn } from "@/lib/utils";
+import { PROJECT_ICONS, getProjectIcon } from "../lib/project-icons";
+
+const DEFAULT_ICON: ProjectIconName = "folder";
+
+interface ProjectIconProps {
+  icon: string | null | undefined;
+  className?: string;
+}
+
+export function ProjectIcon({ icon, className }: ProjectIconProps) {
+  const Icon = getProjectIcon(icon);
+  return <Icon className={className} />;
+}
+
+interface ProjectIconPickerProps {
+  value: string | null | undefined;
+  onChange: (icon: string) => void;
+  children: React.ReactNode;
+}
+
+export function ProjectIconPicker({ value, onChange, children }: ProjectIconPickerProps) {
+  const [open, setOpen] = useState(false);
+  const [search, setSearch] = useState("");
+
+  const filtered = useMemo(() => {
+    const entries = PROJECT_ICON_NAMES.map((name) => [name, PROJECT_ICONS[name]] as const);
+    if (!search) return entries;
+    const q = search.toLowerCase();
+    return entries.filter(([name]) => name.includes(q));
+  }, [search]);
+
+  return (
+    <Popover open={open} onOpenChange={setOpen}>
+      <PopoverTrigger asChild>{children}</PopoverTrigger>
+      <PopoverContent className="w-72 p-3" align="start">
+        <Input
+          placeholder="Search icons..."
+          value={search}
+          onChange={(e) => setSearch(e.target.value)}
+          className="mb-2 h-8 text-sm"
+          autoFocus
+        />
+        <div className="grid grid-cols-7 gap-1 max-h-48 overflow-y-auto">
+          {filtered.map(([name, Icon]) => (
+            <button
+              key={name}
+              onClick={() => {
+                onChange(name);
+                setOpen(false);
+                setSearch("");
+              }}
+              className={cn(
+                "flex items-center justify-center h-8 w-8 rounded hover:bg-accent transition-colors",
+                (value ?? DEFAULT_ICON) === name && "bg-accent ring-1 ring-primary"
+              )}
+              title={name}
+            >
+              <Icon className="h-4 w-4" />
+            </button>
+          ))}
+          {filtered.length === 0 && (
+            <p className="col-span-7 text-xs text-muted-foreground text-center py-2">No icons match</p>
+          )}
+        </div>
+      </PopoverContent>
+    </Popover>
+  );
+}
diff --git a/ui/src/components/ProjectTile.test.tsx b/ui/src/components/ProjectTile.test.tsx
index dc560e428f3..056b7ccc7a5 100644
--- a/ui/src/components/ProjectTile.test.tsx
+++ b/ui/src/components/ProjectTile.test.tsx
@@ -9,7 +9,18 @@ describe("ProjectTile", () => {
     expect(markup).toContain("bg-muted");
     expect(markup).toContain("text-muted-foreground");
     expect(markup).not.toContain("background-color");
-    // Folder icon is always present (fixed for this phase).
+    // Folder icon is the default when no icon prop is supplied.
+    expect(markup).toContain("lucide-folder");
+  });
+
+  it("renders the chosen Lucide icon when an icon prop is provided", () => {
+    const markup = renderToStaticMarkup(<ProjectTile icon="rocket" />);
+    expect(markup).toContain("lucide-rocket");
+    expect(markup).not.toContain("lucide-folder");
+  });
+
+  it("falls back to the folder icon for an unknown icon name", () => {
+    const markup = renderToStaticMarkup(<ProjectTile icon="not-a-real-icon" />);
     expect(markup).toContain("lucide-folder");
   });
 
diff --git a/ui/src/components/ProjectTile.tsx b/ui/src/components/ProjectTile.tsx
index 89ea411baa7..1ab113c827a 100644
--- a/ui/src/components/ProjectTile.tsx
+++ b/ui/src/components/ProjectTile.tsx
@@ -1,15 +1,15 @@
-import { Folder } from "lucide-react";
 import { cn } from "../lib/utils";
+import { getProjectIcon } from "../lib/project-icons";
 
 /**
- * Reusable project tile (IA Phase 3 — PAP-58).
+ * Reusable project tile (IA Phase 3 — PAP-58; icon picker added PAP-68 part 3).
  *
  * Default render is a neutral gray rounded rectangle with a folder icon.
- * An optional `color` tints the background; the folder icon is fixed for all
- * tiles this phase (custom-icon picker is deferred to a later phase).
+ * An optional `color` tints the background; an optional `icon` selects which
+ * Lucide glyph to render (defaults to `folder`).
  *
- * Used by the Projects list rows and the project detail header. The color
- * lives on the project itself (`project.color`) — no new `project.icon` field.
+ * Used by the Projects list rows and the project detail header. Both `color`
+ * and `icon` live on the project itself (`project.color` / `project.icon`).
  */
 
 export type ProjectTileSize = "xs" | "sm" | "md" | "lg";
@@ -24,13 +24,16 @@ const SIZE_STYLES: Record<ProjectTileSize, { box: string; icon: string }> = {
 export interface ProjectTileProps {
   /** Optional project color. When unset, the tile stays neutral gray. */
   color?: string | null;
+  /** Optional Lucide icon name. When unset, defaults to `folder`. */
+  icon?: string | null;
   size?: ProjectTileSize;
   className?: string;
 }
 
-export function ProjectTile({ color, size = "md", className }: ProjectTileProps) {
+export function ProjectTile({ color, icon, size = "md", className }: ProjectTileProps) {
   const dims = SIZE_STYLES[size];
   const tinted = Boolean(color);
+  const Icon = getProjectIcon(icon);
 
   return (
     <span
@@ -43,7 +46,7 @@ export function ProjectTile({ color, size = "md", className }: ProjectTileProps)
       )}
       style={tinted ? { backgroundColor: color ?? undefined } : undefined}
     >
-      <Folder className={dims.icon} />
+      <Icon className={dims.icon} />
     </span>
   );
 }
diff --git a/ui/src/components/RoutineRunVariablesDialog.test.tsx b/ui/src/components/RoutineRunVariablesDialog.test.tsx
index 301239e0c20..f4d5e1c2dc1 100644
--- a/ui/src/components/RoutineRunVariablesDialog.test.tsx
+++ b/ui/src/components/RoutineRunVariablesDialog.test.tsx
@@ -70,6 +70,7 @@ function createProject(): Project {
     leadAgentId: null,
     targetDate: null,
     color: "#22c55e",
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/src/components/SidebarProjects.test.tsx b/ui/src/components/SidebarProjects.test.tsx
index c0bb075cf52..70ab120ca58 100644
--- a/ui/src/components/SidebarProjects.test.tsx
+++ b/ui/src/components/SidebarProjects.test.tsx
@@ -145,6 +145,7 @@ function makeProject(overrides: Partial<Project>): Project {
     leadAgentId: null,
     targetDate: null,
     color: "#ef4444",
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/src/components/SidebarProjects.tsx b/ui/src/components/SidebarProjects.tsx
index 22e99c1d78b..eb189e5b10f 100644
--- a/ui/src/components/SidebarProjects.tsx
+++ b/ui/src/components/SidebarProjects.tsx
@@ -140,7 +140,7 @@ function ProjectItem({
               : "text-foreground/80 hover:bg-accent/50 hover:text-foreground",
           )}
         >
-          <ProjectTile color={project.color ?? null} size="xs" />
+          <ProjectTile color={project.color ?? null} icon={project.icon ?? null} size="xs" />
           <span className="flex-1 truncate">{project.name}</span>
           {project.pauseReason === "budget" ? <BudgetSidebarMarker title="Project paused by budget" /> : null}
         </NavLink>
diff --git a/ui/src/lib/company-portability-sidebar.test.ts b/ui/src/lib/company-portability-sidebar.test.ts
index 2b648fcf899..3dec98ba1a7 100644
--- a/ui/src/lib/company-portability-sidebar.test.ts
+++ b/ui/src/lib/company-portability-sidebar.test.ts
@@ -46,6 +46,7 @@ function makeProject(id: string, name: string): Project {
     leadAgentId: null,
     targetDate: null,
     color: null,
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/src/lib/issueDetailBreadcrumb.test.ts b/ui/src/lib/issueDetailBreadcrumb.test.ts
index 790fc4cd691..cc92b21c5e9 100644
--- a/ui/src/lib/issueDetailBreadcrumb.test.ts
+++ b/ui/src/lib/issueDetailBreadcrumb.test.ts
@@ -82,6 +82,7 @@ describe("issueDetailBreadcrumb", () => {
         leadAgentId: null,
         targetDate: null,
         color: null,
+        icon: null,
         env: null,
         pauseReason: null,
         pausedAt: null,
diff --git a/ui/src/lib/optimistic-issue-comments.test.ts b/ui/src/lib/optimistic-issue-comments.test.ts
index b8e8d300a1d..cd912379d07 100644
--- a/ui/src/lib/optimistic-issue-comments.test.ts
+++ b/ui/src/lib/optimistic-issue-comments.test.ts
@@ -594,6 +594,7 @@ describe("optimistic issue comments", () => {
           leadAgentId: null,
           targetDate: null,
           color: null,
+          icon: null,
           env: null,
           pauseReason: null,
           pausedAt: null,
diff --git a/ui/src/lib/project-icons.ts b/ui/src/lib/project-icons.ts
new file mode 100644
index 00000000000..a76207e2b02
--- /dev/null
+++ b/ui/src/lib/project-icons.ts
@@ -0,0 +1,94 @@
+import {
+  Atom,
+  Box,
+  Boxes,
+  Brain,
+  Briefcase,
+  Bug,
+  Code,
+  Cog,
+  Compass,
+  Cpu,
+  Crown,
+  Database,
+  FileCode,
+  Flame,
+  Folder,
+  Gem,
+  GitBranch,
+  Globe,
+  Hammer,
+  Heart,
+  Hexagon,
+  Layers,
+  Lightbulb,
+  Lock,
+  Mail,
+  MessageSquare,
+  Package,
+  Puzzle,
+  Radar,
+  Rocket,
+  Search,
+  Shield,
+  Sparkles,
+  Star,
+  Target,
+  Telescope,
+  Terminal,
+  Wrench,
+  Zap,
+  type LucideIcon,
+} from "lucide-react";
+import { PROJECT_ICON_NAMES, type ProjectIconName } from "@paperclipai/shared";
+
+export const PROJECT_ICONS: Record<ProjectIconName, LucideIcon> = {
+  folder: Folder,
+  rocket: Rocket,
+  code: Code,
+  terminal: Terminal,
+  database: Database,
+  globe: Globe,
+  package: Package,
+  boxes: Boxes,
+  box: Box,
+  layers: Layers,
+  briefcase: Briefcase,
+  compass: Compass,
+  target: Target,
+  flame: Flame,
+  zap: Zap,
+  star: Star,
+  bug: Bug,
+  wrench: Wrench,
+  hammer: Hammer,
+  lightbulb: Lightbulb,
+  sparkles: Sparkles,
+  shield: Shield,
+  lock: Lock,
+  search: Search,
+  cog: Cog,
+  brain: Brain,
+  cpu: Cpu,
+  "git-branch": GitBranch,
+  "file-code": FileCode,
+  puzzle: Puzzle,
+  gem: Gem,
+  atom: Atom,
+  heart: Heart,
+  mail: Mail,
+  "message-square": MessageSquare,
+  crown: Crown,
+  radar: Radar,
+  telescope: Telescope,
+  hexagon: Hexagon,
+};
+
+const DEFAULT_ICON: ProjectIconName = "folder";
+
+export function getProjectIcon(iconName: string | null | undefined): LucideIcon {
+  if (iconName && PROJECT_ICON_NAMES.includes(iconName as ProjectIconName)) {
+    return PROJECT_ICONS[iconName as ProjectIconName];
+  }
+  return PROJECT_ICONS[DEFAULT_ICON];
+}
diff --git a/ui/src/pages/ExecutionWorkspaceDetail.test.tsx b/ui/src/pages/ExecutionWorkspaceDetail.test.tsx
index a8a685da182..c96aad1120c 100644
--- a/ui/src/pages/ExecutionWorkspaceDetail.test.tsx
+++ b/ui/src/pages/ExecutionWorkspaceDetail.test.tsx
@@ -155,6 +155,7 @@ function project(overrides: Partial<Project> = {}): Project {
     leadAgentId: null,
     targetDate: null,
     color: "#14b8a6",
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/src/pages/ProjectDetail.test.tsx b/ui/src/pages/ProjectDetail.test.tsx
index b9dafe90eb1..9579bbf61ca 100644
--- a/ui/src/pages/ProjectDetail.test.tsx
+++ b/ui/src/pages/ProjectDetail.test.tsx
@@ -116,6 +116,7 @@ function project(overrides: Partial<Project> = {}): Project {
     leadAgentId: null,
     targetDate: null,
     color: "#14b8a6",
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/src/pages/ProjectDetail.tsx b/ui/src/pages/ProjectDetail.tsx
index e5614ac409c..0a4972bba11 100644
--- a/ui/src/pages/ProjectDetail.tsx
+++ b/ui/src/pages/ProjectDetail.tsx
@@ -108,9 +108,11 @@ function OverviewContent({
 
 function ColorPicker({
   color,
+  icon,
   onSelect,
 }: {
   color: string | null;
+  icon?: string | null;
   onSelect: (color: string | null) => void;
 }) {
   const [open, setOpen] = useState(false);
@@ -135,7 +137,7 @@ function ColorPicker({
         className="shrink-0 rounded-lg cursor-pointer hover:ring-2 hover:ring-foreground/20 transition-[box-shadow]"
         aria-label="Change project color"
       >
-        <ProjectTile color={color} size="md" />
+        <ProjectTile color={color} icon={icon ?? null} size="md" />
       </button>
       {open && (
         <div className="absolute top-full left-0 mt-2 p-3 bg-popover border border-border rounded-lg shadow-lg z-50 w-max">
@@ -722,6 +724,7 @@ export function ProjectDetail() {
         <div className="h-7 flex items-center">
           <ColorPicker
             color={project.color ?? null}
+            icon={project.icon ?? null}
             onSelect={(color) => updateProject.mutate({ color })}
           />
         </div>
diff --git a/ui/src/pages/ProjectWorkspaceDetail.test.tsx b/ui/src/pages/ProjectWorkspaceDetail.test.tsx
index 616fe863ceb..1b761a2eaf6 100644
--- a/ui/src/pages/ProjectWorkspaceDetail.test.tsx
+++ b/ui/src/pages/ProjectWorkspaceDetail.test.tsx
@@ -137,6 +137,7 @@ function project(overrides: Partial<Project> = {}): Project {
     leadAgentId: null,
     targetDate: null,
     color: "#14b8a6",
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/src/pages/Projects.test.tsx b/ui/src/pages/Projects.test.tsx
index 54daec0a69a..53a417f19ac 100644
--- a/ui/src/pages/Projects.test.tsx
+++ b/ui/src/pages/Projects.test.tsx
@@ -76,6 +76,7 @@ function makeProject(overrides: Partial<Project>): Project {
     leadAgentId: null,
     targetDate: null,
     color: "#ef4444",
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/src/pages/Projects.tsx b/ui/src/pages/Projects.tsx
index 16321a28b57..d6b201f3ac1 100644
--- a/ui/src/pages/Projects.tsx
+++ b/ui/src/pages/Projects.tsx
@@ -207,7 +207,7 @@ export function Projects() {
                     return (
                       <EntityRow
                         key={project.id}
-                        leading={<ProjectTile color={project.color ?? null} size="sm" />}
+                        leading={<ProjectTile color={project.color ?? null} icon={project.icon ?? null} size="sm" />}
                         title={project.name}
                         subtitle={project.description ?? undefined}
                         reserveSubtitleSpace
diff --git a/ui/storybook/fixtures/paperclipData.ts b/ui/storybook/fixtures/paperclipData.ts
index d798c9ee039..3e430703ac5 100644
--- a/ui/storybook/fixtures/paperclipData.ts
+++ b/ui/storybook/fixtures/paperclipData.ts
@@ -590,6 +590,7 @@ function createProject(overrides: Partial<Project> = {}): Project {
     leadAgentId: "agent-codex",
     targetDate: "2026-04-30",
     color: "#0f766e",
+    icon: null,
     env: null,
     pauseReason: null,
     pausedAt: null,
diff --git a/ui/storybook/stories/forms-editors.stories.tsx b/ui/storybook/stories/forms-editors.stories.tsx
index bdf863459ab..8c267fea905 100644
--- a/ui/storybook/stories/forms-editors.stories.tsx
+++ b/ui/storybook/stories/forms-editors.stories.tsx
@@ -296,6 +296,7 @@ const storybookProject: Project = {
   leadAgentId: "agent-codex",
   targetDate: null,
   color: "#0f766e",
+  icon: null,
   env: null,
   pauseReason: null,
   pausedAt: null,