diff --git a/src/components/reply-branch.tsx b/src/components/reply-branch.tsx
index 079278d..0800616 100644
--- a/src/components/reply-branch.tsx
+++ b/src/components/reply-branch.tsx
@@ -33,6 +33,7 @@ interface ReplyBranchProps {
   /** URI of the parent node in the tree (topicUri for root level) */
   treeParentUri?: string
   onReply?: (target: { uri: string; cid: string; authorHandle: string; snippet: string }) => void
+  onDeleteReply?: () => void
   currentUserDid?: string
 }
 
@@ -45,6 +46,7 @@ export function ReplyBranch({
   currentVisualDepth,
   treeParentUri,
   onReply,
+  onDeleteReply,
   currentUserDid,
 }: ReplyBranchProps) {
   // Auto-collapse: nodes at depth >= DEFAULT_EXPANDED_LEVELS with children start collapsed
@@ -121,6 +123,8 @@ export function ReplyBranch({
                   postNumber={postNumber}
                   onReply={onReply}
                   canEdit={currentUserDid ? node.reply.authorDid === currentUserDid : false}
+                  canDelete={currentUserDid ? node.reply.authorDid === currentUserDid : false}
+                  onDelete={onDeleteReply}
                 />
               </div>
             </div>
@@ -137,6 +141,7 @@ export function ReplyBranch({
                   currentVisualDepth={currentVisualDepth}
                   treeParentUri={node.reply.uri}
                   onReply={onReply}
+                  onDeleteReply={onDeleteReply}
                   currentUserDid={currentUserDid}
                 />
               ) : (
diff --git a/src/components/reply-card.test.tsx b/src/components/reply-card.test.tsx
index f2bd5f4..b0a1684 100644
--- a/src/components/reply-card.test.tsx
+++ b/src/components/reply-card.test.tsx
@@ -9,7 +9,7 @@ import { axe } from 'vitest-axe'
 import { ReplyCard } from './reply-card'
 import { mockReplies, mockAuthorDeletedReply, mockModDeletedReply } from '@/mocks/data'
 import { useAuth } from '@/hooks/use-auth'
-import { updateReply } from '@/lib/api/client'
+import { updateReply, deleteReply } from '@/lib/api/client'
 import type { Reply } from '@/lib/api/types'
 import { createMockOnboardingContext } from '@/test/mock-onboarding'
 
@@ -43,6 +43,7 @@ vi.mock('@/context/onboarding-context', () => ({
 // Mock API client
 vi.mock('@/lib/api/client', () => ({
   updateReply: vi.fn(),
+  deleteReply: vi.fn(),
   getReactions: vi.fn().mockResolvedValue({ reactions: [], cursor: null }),
   createReaction: vi.fn().mockResolvedValue({ uri: 'at://test', cid: 'bafyrei-test' }),
   deleteReaction: vi.fn().mockResolvedValue(undefined),
@@ -402,4 +403,136 @@ describe('ReplyCard', () => {
       expect(results).toHaveNoViolations()
     })
   })
+
+  describe('delete mode', () => {
+    beforeEach(() => {
+      vi.mocked(useAuth).mockReturnValue({
+        user: {
+          did: reply.authorDid,
+          handle: reply.author?.handle ?? '',
+          displayName: 'Alex',
+          avatarUrl: null,
+          role: 'user',
+        },
+        isAuthenticated: true,
+        isLoading: false,
+        crossPostScopesGranted: false,
+        getAccessToken: () => 'mock-token',
+        login: vi.fn(),
+        logout: vi.fn(),
+        setSessionFromCallback: vi.fn(),
+        requestCrossPostAuth: vi.fn(),
+        authFetch: vi.fn(),
+      } as ReturnType<typeof useAuth>)
+    })
+
+    it('renders Delete button when canDelete is true', () => {
+      render(<ReplyCard reply={reply} postNumber={2} canDelete={true} />)
+      expect(
+        screen.getByRole('button', {
+          name: `Delete reply by ${reply.author?.handle ?? reply.authorDid}`,
+        })
+      ).toBeInTheDocument()
+    })
+
+    it('does not render Delete button when canDelete is false', () => {
+      render(<ReplyCard reply={reply} postNumber={2} />)
+      expect(screen.queryByRole('button', { name: /delete reply by/i })).not.toBeInTheDocument()
+    })
+
+    it('does not render Delete button on deleted replies', () => {
+      render(<ReplyCard reply={mockAuthorDeletedReply} postNumber={4} canDelete={true} />)
+      expect(screen.queryByRole('button', { name: /delete reply by/i })).not.toBeInTheDocument()
+    })
+
+    it('shows confirmation dialog when Delete is clicked', async () => {
+      const user = userEvent.setup()
+      render(<ReplyCard reply={reply} postNumber={2} canDelete={true} />)
+      await user.click(screen.getByRole('button', { name: /delete reply by/i }))
+      expect(screen.getByRole('alertdialog')).toBeInTheDocument()
+      expect(screen.getByText('Delete reply?')).toBeInTheDocument()
+      expect(
+        screen.getByText('This will permanently remove your reply. This cannot be undone.')
+      ).toBeInTheDocument()
+    })
+
+    it('closes confirmation dialog when Cancel is clicked', async () => {
+      const user = userEvent.setup()
+      render(<ReplyCard reply={reply} postNumber={2} canDelete={true} />)
+      await user.click(screen.getByRole('button', { name: /delete reply by/i }))
+      expect(screen.getByRole('alertdialog')).toBeInTheDocument()
+      await user.click(screen.getByRole('button', { name: 'Cancel' }))
+      expect(screen.queryByRole('alertdialog')).not.toBeInTheDocument()
+    })
+
+    it('calls deleteReply with correct args on confirm', async () => {
+      const user = userEvent.setup()
+      vi.mocked(deleteReply).mockResolvedValueOnce(undefined)
+      render(<ReplyCard reply={reply} postNumber={2} canDelete={true} onDelete={vi.fn()} />)
+      await user.click(screen.getByRole('button', { name: /delete reply by/i }))
+      await user.click(screen.getByRole('button', { name: 'Delete' }))
+      await waitFor(() => {
+        expect(deleteReply).toHaveBeenCalledWith(reply.uri, 'mock-token')
+      })
+    })
+
+    it('calls onDelete callback after successful deletion', async () => {
+      const user = userEvent.setup()
+      const onDelete = vi.fn()
+      vi.mocked(deleteReply).mockResolvedValueOnce(undefined)
+      render(<ReplyCard reply={reply} postNumber={2} canDelete={true} onDelete={onDelete} />)
+      await user.click(screen.getByRole('button', { name: /delete reply by/i }))
+      await user.click(screen.getByRole('button', { name: 'Delete' }))
+      await waitFor(() => {
+        expect(onDelete).toHaveBeenCalled()
+      })
+    })
+
+    it('shows success toast after deletion', async () => {
+      const user = userEvent.setup()
+      vi.mocked(deleteReply).mockResolvedValueOnce(undefined)
+      render(<ReplyCard reply={reply} postNumber={2} canDelete={true} onDelete={vi.fn()} />)
+      await user.click(screen.getByRole('button', { name: /delete reply by/i }))
+      await user.click(screen.getByRole('button', { name: 'Delete' }))
+      await waitFor(() => {
+        expect(mockToast).toHaveBeenCalledWith({ title: 'Reply deleted' })
+      })
+    })
+
+    it('shows error toast on delete failure', async () => {
+      const user = userEvent.setup()
+      vi.mocked(deleteReply).mockRejectedValueOnce(new Error('Server error'))
+      render(<ReplyCard reply={reply} postNumber={2} canDelete={true} onDelete={vi.fn()} />)
+      await user.click(screen.getByRole('button', { name: /delete reply by/i }))
+      await user.click(screen.getByRole('button', { name: 'Delete' }))
+      await waitFor(() => {
+        expect(mockToast).toHaveBeenCalledWith({
+          title: 'Error',
+          description: 'Server error',
+          variant: 'destructive',
+        })
+      })
+    })
+
+    it('does not call onDelete on failure', async () => {
+      const user = userEvent.setup()
+      const onDelete = vi.fn()
+      vi.mocked(deleteReply).mockRejectedValueOnce(new Error('Server error'))
+      render(<ReplyCard reply={reply} postNumber={2} canDelete={true} onDelete={onDelete} />)
+      await user.click(screen.getByRole('button', { name: /delete reply by/i }))
+      await user.click(screen.getByRole('button', { name: 'Delete' }))
+      await waitFor(() => {
+        expect(mockToast).toHaveBeenCalled()
+      })
+      expect(onDelete).not.toHaveBeenCalled()
+    })
+
+    it('passes axe accessibility check with delete confirmation dialog open', async () => {
+      const user = userEvent.setup()
+      const { container } = render(<ReplyCard reply={reply} postNumber={2} canDelete={true} />)
+      await user.click(screen.getByRole('button', { name: /delete reply by/i }))
+      const results = await axe(container)
+      expect(results).toHaveNoViolations()
+    })
+  })
 })
diff --git a/src/components/reply-card.tsx b/src/components/reply-card.tsx
index be9929d..ee09fde 100644
--- a/src/components/reply-card.tsx
+++ b/src/components/reply-card.tsx
@@ -11,10 +11,10 @@
 import { useState, useCallback } from 'react'
 import Link from 'next/link'
 import Image from 'next/image'
-import { Clock, Link as LinkIcon, ChatCircle, PencilSimple } from '@phosphor-icons/react'
+import { Clock, Link as LinkIcon, ChatCircle, PencilSimple, Trash } from '@phosphor-icons/react'
 import type { Reply } from '@/lib/api/types'
 import { formatRelativeTime, isEdited } from '@/lib/format'
-import { updateReply } from '@/lib/api/client'
+import { updateReply, deleteReply } from '@/lib/api/client'
 import { useAuth } from '@/hooks/use-auth'
 import { useToast } from '@/hooks/use-toast'
 import { MarkdownContent } from './markdown-content'
@@ -22,6 +22,7 @@ import { MarkdownEditor } from './markdown-editor'
 import { LikeButton } from './like-button'
 import { ReactionBar } from './reaction-bar'
 import { ReportDialog, type ReportSubmission } from './report-dialog'
+import { ConfirmDialog } from './confirm-dialog'
 import { SelfLabelIndicator } from './self-label-indicator'
 
 interface ReactionData {
@@ -37,6 +38,8 @@ interface ReplyCardProps {
   onReactionToggle?: (type: string) => void
   onReply?: (target: { uri: string; cid: string; authorHandle: string; snippet: string }) => void
   canEdit?: boolean
+  canDelete?: boolean
+  onDelete?: () => void
   canReport?: boolean
   onReport?: (report: ReportSubmission) => void
   selfLabels?: string[]
@@ -50,6 +53,8 @@ export function ReplyCard({
   onReactionToggle,
   onReply,
   canEdit,
+  canDelete,
+  onDelete,
   canReport,
   onReport,
   selfLabels,
@@ -59,6 +64,7 @@ export function ReplyCard({
   const [editContent, setEditContent] = useState(reply.content)
   const [displayContent, setDisplayContent] = useState(reply.content)
   const [saving, setSaving] = useState(false)
+  const [showDeleteConfirm, setShowDeleteConfirm] = useState(false)
   const { getAccessToken } = useAuth()
   const { toast } = useToast()
 
@@ -81,6 +87,19 @@ export function ReplyCard({
     }
   }, [editContent, reply.uri, getAccessToken, toast])
 
+  const handleConfirmDelete = useCallback(async () => {
+    try {
+      const accessToken = getAccessToken() ?? ''
+      await deleteReply(reply.uri, accessToken)
+      setShowDeleteConfirm(false)
+      toast({ title: 'Reply deleted' })
+      onDelete?.()
+    } catch (err) {
+      const message = err instanceof Error ? err.message : 'Failed to delete reply'
+      toast({ title: 'Error', description: message, variant: 'destructive' })
+    }
+  }, [reply.uri, getAccessToken, toast, onDelete])
+
   const headingId = `reply-heading-${reply.rkey}`
   const isDeleted = reply.isAuthorDeleted || reply.isModDeleted
 
@@ -259,6 +278,18 @@ export function ReplyCard({
             </button>
           )}
 
+          {canDelete && (
+            <button
+              type="button"
+              onClick={() => setShowDeleteConfirm(true)}
+              className="flex items-center gap-1 text-muted-foreground transition-colors hover:text-destructive"
+              aria-label={`Delete reply by ${reply.author?.handle ?? reply.authorDid}`}
+            >
+              <Trash className="h-3.5 w-3.5" weight="regular" aria-hidden="true" />
+              Delete
+            </button>
+          )}
+
           {onReply && (
             <button
               type="button"
@@ -281,6 +312,17 @@ export function ReplyCard({
           {canReport && onReport && <ReportDialog subjectUri={reply.uri} onSubmit={onReport} />}
         </div>
       </article>
+
+      <ConfirmDialog
+        open={showDeleteConfirm}
+        title="Delete reply?"
+        description="This will permanently remove your reply. This cannot be undone."
+        confirmLabel="Delete"
+        cancelLabel="Cancel"
+        variant="destructive"
+        onConfirm={handleConfirmDelete}
+        onCancel={() => setShowDeleteConfirm(false)}
+      />
     </div>
   )
 }
diff --git a/src/components/reply-thread.tsx b/src/components/reply-thread.tsx
index bf355d2..e50c62a 100644
--- a/src/components/reply-thread.tsx
+++ b/src/components/reply-thread.tsx
@@ -19,6 +19,7 @@ interface ReplyThreadProps {
   replies: Reply[]
   topicUri: string
   onReply?: (target: { uri: string; cid: string; authorHandle: string; snippet: string }) => void
+  onDeleteReply?: () => void
   currentUserDid?: string
   className?: string
 }
@@ -27,6 +28,7 @@ export function ReplyThread({
   replies,
   topicUri,
   onReply,
+  onDeleteReply,
   currentUserDid,
   className,
 }: ReplyThreadProps) {
@@ -64,6 +66,7 @@ export function ReplyThread({
           visualIndentCap={visualIndentCap}
           currentVisualDepth={1}
           onReply={onReply}
+          onDeleteReply={onDeleteReply}
           currentUserDid={currentUserDid}
         />
       )}
diff --git a/src/components/topic-detail-client.tsx b/src/components/topic-detail-client.tsx
index 6daeea9..af6da0b 100644
--- a/src/components/topic-detail-client.tsx
+++ b/src/components/topic-detail-client.tsx
@@ -88,6 +88,10 @@ export function TopicDetailClient({ topic, replies, isLocked = false }: TopicDet
     setReplyTarget(null)
   }, [])
 
+  const handleDeleteReply = useCallback(() => {
+    router.refresh()
+  }, [router])
+
   const handleReplyCreated = useCallback(() => {
     setReplyTarget(null)
     setComposerContent('')
@@ -122,6 +126,7 @@ export function TopicDetailClient({ topic, replies, isLocked = false }: TopicDet
           replies={replies}
           topicUri={topic.uri}
           onReply={isLocked ? undefined : handleReply}
+          onDeleteReply={handleDeleteReply}
           currentUserDid={user?.did}
         />
       </div>
diff --git a/src/lib/api/client.ts b/src/lib/api/client.ts
index dd7b91d..01d200e 100644
--- a/src/lib/api/client.ts
+++ b/src/lib/api/client.ts
@@ -329,6 +329,21 @@ export function updateReply(
   })
 }
 
+export function deleteReply(
+  uri: string,
+  accessToken: string,
+  options?: FetchOptions
+): Promise<void> {
+  return apiFetch<void>(`/api/replies/${encodeURIComponent(uri)}`, {
+    ...options,
+    method: 'DELETE',
+    headers: {
+      ...options?.headers,
+      Authorization: `Bearer ${accessToken}`,
+    },
+  })
+}
+
 // --- Search endpoints ---
 
 export interface SearchParams extends PaginationParams {