diff --git a/routes/_actions/block.js b/routes/_actions/block.js
new file mode 100644
index 00000000..07587757
--- /dev/null
+++ b/routes/_actions/block.js
@@ -0,0 +1,27 @@
+import { store } from '../_store/store'
+import { blockAccount, unblockAccount } from '../_api/block'
+import { toast } from '../_utils/toast'
+import { updateProfileAndRelationship } from './accounts'
+
+export async function setAccountBlocked (accountId, block, toastOnSuccess) {
+  let instanceName = store.get('currentInstance')
+  let accessToken = store.get('accessToken')
+  try {
+    if (block) {
+      await blockAccount(instanceName, accessToken, accountId)
+    } else {
+      await unblockAccount(instanceName, accessToken, accountId)
+    }
+    await updateProfileAndRelationship(accountId)
+    if (toastOnSuccess) {
+      if (block) {
+        toast.say('Blocked account')
+      } else {
+        toast.say('Unblocked account')
+      }
+    }
+  } catch (e) {
+    console.error(e)
+    toast.say(`Unable to ${block ? 'block' : 'unblock'} account: ` + (e.message || ''))
+  }
+}
diff --git a/routes/_api/block.js b/routes/_api/block.js
new file mode 100644
index 00000000..772444f6
--- /dev/null
+++ b/routes/_api/block.js
@@ -0,0 +1,12 @@
+import { auth, basename } from './utils'
+import { postWithTimeout } from '../_utils/ajax'
+
+export async function blockAccount (instanceName, accessToken, accountId) {
+  let url = `${basename(instanceName)}/api/v1/accounts/${accountId}/block`
+  return postWithTimeout(url, null, auth(accessToken))
+}
+
+export async function unblockAccount (instanceName, accessToken, accountId) {
+  let url = `${basename(instanceName)}/api/v1/accounts/${accountId}/unblock`
+  return postWithTimeout(url, null, auth(accessToken))
+}
diff --git a/routes/_components/IconButton.html b/routes/_components/IconButton.html
index c4d09a96..02d4d9fa 100644
--- a/routes/_components/IconButton.html
+++ b/routes/_components/IconButton.html
@@ -1,5 +1,6 @@
 {{#if delegateKey}}
   <button type="button"
+          title="{{label}}"
           aria-label="{{label}}"
           aria-pressed="{{pressable ? !!pressed : ''}}"
           class="{{computedClass}}"
@@ -12,6 +13,7 @@
   </button>
 {{else}}
   <button type="button"
+          title="{{label}}"
           aria-label="{{label}}"
           aria-pressed="{{pressable ? !!pressed : ''}}"
           class="{{computedClass}}"
diff --git a/routes/_components/dialog/components/AccountProfileOptionsDialog.html b/routes/_components/dialog/components/AccountProfileOptionsDialog.html
index 65d68b9b..ee10527a 100644
--- a/routes/_components/dialog/components/AccountProfileOptionsDialog.html
+++ b/routes/_components/dialog/components/AccountProfileOptionsDialog.html
@@ -15,6 +15,7 @@ import { createDialogId } from '../helpers/createDialogId'
 import { show } from '../helpers/showDialog'
 import { close } from '../helpers/closeDialog'
 import { oncreate } from '../helpers/onCreateDialog'
+import { setAccountBlocked } from '../../../_actions/block'
 
 export default {
   oncreate,
@@ -23,12 +24,18 @@ export default {
     id: createDialogId()
   }),
   computed: {
-    items: (account) => (
+    blocking: (relationship) => relationship && relationship.blocking,
+    items: (account, blocking) => (
       [
         {
           key: 'mention',
-          label: 'Mention @' + (account.acct),
+          label: `Mention @${account.acct}`,
           icon: '#fa-comments'
+        },
+        {
+          key: 'block',
+          label: blocking ? `Unblock @${account.acct}` : `Block @${account.acct}`,
+          icon: blocking ? '#fa-unlock' : '#fa-ban'
         }
       ]
     )
@@ -36,7 +43,15 @@ export default {
   methods: {
     show,
     close,
-    async onClick() {
+    onClick(item) {
+      switch (item.key) {
+        case 'mention':
+          return this.onMentionClicked()
+        case 'block':
+          return this.onBlockClicked()
+      }
+    },
+    async onMentionClicked() {
       let account = this.get('account')
       this.store.setComposeData('dialog', {
         text: `@${account.acct} `
@@ -44,6 +59,13 @@ export default {
       let dialogs = await importDialogs()
       dialogs.showComposeDialog()
       this.close()
+    },
+    async onBlockClicked() {
+      let account = this.get('account')
+      let blocking = this.get('blocking')
+      let accountId = account.id
+      this.close()
+      await setAccountBlocked(accountId, !blocking, true)
     }
   },
   components: {
diff --git a/routes/_components/dialog/components/StatusOptionsDialog.html b/routes/_components/dialog/components/StatusOptionsDialog.html
index 7580869c..c85fb5a2 100644
--- a/routes/_components/dialog/components/StatusOptionsDialog.html
+++ b/routes/_components/dialog/components/StatusOptionsDialog.html
@@ -15,6 +15,7 @@ import { doDeleteStatus } from '../../../_actions/delete'
 import { show } from '../helpers/showDialog'
 import { close } from '../helpers/closeDialog'
 import { oncreate } from '../helpers/onCreateDialog'
+import { setAccountBlocked } from '../../../_actions/block'
 
 export default {
   oncreate,
@@ -26,6 +27,7 @@ export default {
     following: (relationship) => relationship && relationship.following,
     followRequested: (relationship) => relationship && relationship.requested,
     accountId: (account) => account && account.id,
+    blocking: (relationship) => relationship.blocking,
     followLabel: (following, followRequested, account) => {
       if (typeof following === 'undefined' || !account) {
         return ''
@@ -34,19 +36,28 @@ export default {
         ? `Unfollow @${account.acct}`
         : `Follow @${account.acct}`
     },
-    items: (followLabel, following, followRequested, accountId, verifyCredentialsId) => (
+    blockLabel: (blocking, account) => {
+      return blocking ? `Unblock @${account.acct}` : `Block @${account.acct}`
+    },
+    items: (blockLabel, blocking, followLabel, following, followRequested, accountId, verifyCredentialsId) => (
       [
-        accountId !== verifyCredentialsId &&
-        {
-          key: 'follow',
-          label: followLabel,
-          icon: following ? '#fa-user-times' : followRequested ? '#fa-hourglass' : '#fa-user-plus'
-        },
         accountId === verifyCredentialsId &&
         {
           key: 'delete',
           label: 'Delete',
           icon: '#fa-trash'
+        },
+        accountId !== verifyCredentialsId && !blocking &&
+        {
+          key: 'follow',
+          label: followLabel,
+          icon: following ? '#fa-user-times' : followRequested ? '#fa-hourglass' : '#fa-user-plus'
+        },
+        accountId !== verifyCredentialsId &&
+        {
+          key: 'block',
+          label: blockLabel,
+          icon: blocking ? '#fa-unlock' : '#fa-ban'
         }
       ].filter(Boolean)
     )
@@ -59,17 +70,32 @@ export default {
   methods: {
     show,
     close,
-    async onClick(item) {
-      if (item.key === 'follow') {
-        let accountId = this.get('accountId')
-        let following = this.get('following')
-        await setAccountFollowed(accountId, !following, true)
-        this.close()
-      } else if (item.key === 'delete') {
-        let statusId = this.get('statusId')
-        await doDeleteStatus(statusId)
-        this.close()
+    onClick(item) {
+      switch (item.key) {
+        case 'delete':
+          return this.onDeleteClicked()
+        case 'follow':
+          return this.onFollowClicked()
+        case 'block':
+          return this.onBlockClicked()
       }
+    },
+    async onDeleteClicked() {
+      let statusId = this.get('statusId')
+      this.close()
+      await doDeleteStatus(statusId)
+    },
+    async onFollowClicked() {
+      let accountId = this.get('accountId')
+      let following = this.get('following')
+      this.close()
+      await setAccountFollowed(accountId, !following, true)
+    },
+    async onBlockClicked() {
+      let accountId = this.get('accountId')
+      let blocking = this.get('blocking')
+      this.close()
+      await setAccountBlocked(accountId, !blocking, true)
     }
   }
 }
diff --git a/routes/_components/dialog/creators/showAccountProfileOptionsDialog.js b/routes/_components/dialog/creators/showAccountProfileOptionsDialog.js
index 9083201c..51e38e46 100644
--- a/routes/_components/dialog/creators/showAccountProfileOptionsDialog.js
+++ b/routes/_components/dialog/creators/showAccountProfileOptionsDialog.js
@@ -2,14 +2,15 @@ import AccountProfileOptionsDialog from '../components/AccountProfileOptionsDial
 import { createDialogElement } from '../helpers/createDialogElement'
 import { createDialogId } from '../helpers/createDialogId'
 
-export function showAccountProfileOptionsDialog (account) {
+export function showAccountProfileOptionsDialog (account, relationship) {
   let dialog = new AccountProfileOptionsDialog({
     target: createDialogElement(),
     data: {
       id: createDialogId(),
       label: 'Profile options dialog',
       title: '',
-      account: account
+      account: account,
+      relationship: relationship
     }
   })
   dialog.show()
diff --git a/routes/_components/profile/AccountProfile.html b/routes/_components/profile/AccountProfile.html
index 72ba7fcd..629ad274 100644
--- a/routes/_components/profile/AccountProfile.html
+++ b/routes/_components/profile/AccountProfile.html
@@ -5,7 +5,7 @@
       <AccountProfileHeader :account :relationship :verifyCredentials />
       <AccountProfileFollow :account :relationship :verifyCredentials />
       <AccountProfileNote :account />
-      <AccountProfileDetails :account />
+      <AccountProfileDetails :account :relationship />
     </div>
   </div>
 </div>
diff --git a/routes/_components/profile/AccountProfileDetails.html b/routes/_components/profile/AccountProfileDetails.html
index 847ced06..86f0f75d 100644
--- a/routes/_components/profile/AccountProfileDetails.html
+++ b/routes/_components/profile/AccountProfileDetails.html
@@ -119,8 +119,9 @@
     methods: {
       async onMoreOptionsClick() {
         let account = this.get('account')
+        let relationship = this.get('relationship')
         let dialogs = await importDialogs()
-        dialogs.showAccountProfileOptionsDialog(account)
+        dialogs.showAccountProfileOptionsDialog(account, relationship)
       }
     },
     components: {
diff --git a/routes/_components/profile/AccountProfileFollow.html b/routes/_components/profile/AccountProfileFollow.html
index a61b3fdf..ea49a4f0 100644
--- a/routes/_components/profile/AccountProfileFollow.html
+++ b/routes/_components/profile/AccountProfileFollow.html
@@ -24,6 +24,7 @@
   import { FOLLOW_BUTTON_ANIMATION } from '../../_static/animations'
   import { store } from '../../_store/store'
   import { setAccountFollowed } from '../../_actions/follow'
+  import { setAccountBlocked } from '../../_actions/block'
 
   export default {
     methods: {
@@ -34,12 +35,18 @@
         let accountId = this.get('accountId')
         let following = this.get('following')
         let followRequested = this.get('followRequested')
+        let blocking = this.get('blocking')
         this.set({animateFollowButton: true}) // TODO: this should be an event, not toggling a boolean
-        let newFollowingValue = !(following || followRequested)
-        if (!account.locked) { // be optimistic, show the user that it succeeded
-          this.set({overrideFollowing: newFollowingValue})
+        if (blocking) { // unblock
+          await setAccountBlocked(accountId, false)
+        } else { // follow/unfollow
+          let newFollowingValue = !(following || followRequested)
+          if (!account.locked) { // be optimistic, show the user that it succeeded
+            this.set({overrideFollowing: newFollowingValue})
+          }
+          await setAccountFollowed(accountId, newFollowingValue)
         }
-        await setAccountFollowed(accountId, newFollowingValue)
+
         this.set({animateFollowButton: false}) // let animation play next time
       }
     },
@@ -55,11 +62,14 @@
         }
         return relationship && relationship.following
       },
+      blocking: (relationship) => relationship.blocking,
       followRequested: (relationship, account) => {
         return relationship && relationship.requested && account && account.locked
       },
-      followLabel: (following, followRequested) => {
-        if (following) {
+      followLabel: (blocking, following, followRequested) => {
+        if (blocking) {
+          return 'Unblock'
+        } else if (following) {
           return 'Unfollow'
         } else if (followRequested) {
           return 'Unfollow (follow requested)'
@@ -67,8 +77,10 @@
           return 'Follow'
         }
       },
-      followIcon: (following, followRequested) => {
-        if (following) {
+      followIcon: (blocking, following, followRequested) => {
+        if (blocking) {
+          return '#fa-unlock'
+        } else if (following) {
           return '#fa-user-times'
         } else if (followRequested) {
           return '#fa-hourglass'
diff --git a/routes/_components/profile/AccountProfileHeader.html b/routes/_components/profile/AccountProfileHeader.html
index 1375518e..537cf1fe 100644
--- a/routes/_components/profile/AccountProfileHeader.html
+++ b/routes/_components/profile/AccountProfileHeader.html
@@ -10,7 +10,9 @@
   {{'@' + account.acct}}
 </div>
 <div class="account-profile-followed-by">
-  {{#if relationship && relationship.followed_by}}
+  {{#if relationship && relationship.blocking}}
+    <span class="account-profile-followed-by-span">Blocked</span>
+  {{elseif relationship && relationship.followed_by}}
     <span class="account-profile-followed-by-span">Follows you</span>
   {{/if}}
 </div>
diff --git a/tests/spec/113-block-unblock.js b/tests/spec/113-block-unblock.js
new file mode 100644
index 00000000..12613aa5
--- /dev/null
+++ b/tests/spec/113-block-unblock.js
@@ -0,0 +1,53 @@
+import {
+  accountProfileFollowButton,
+  accountProfileFollowedBy, accountProfileMoreOptionsButton, communityNavButton, getNthSearchResult,
+  getNthStatus, getNthStatusOptionsButton, getNthDialogOptionsOption, getUrl, modalDialog
+} from '../utils'
+import { Selector as $ } from 'testcafe'
+import { foobarRole } from '../roles'
+import { postAs } from '../serverActions'
+
+fixture`113-block-unblock.js`
+  .page`http://localhost:4002`
+
+test('Can block and unblock an account from a status', async t => {
+  await t.useRole(foobarRole)
+  let post = 'a very silly statement that should probably get me blocked'
+  await postAs('admin', post)
+
+  await t.expect(getNthStatus(0).innerText).contains(post, {timeout: 20000})
+    .click(getNthStatusOptionsButton(0))
+    .expect(getNthDialogOptionsOption(1).innerText).contains('Unfollow @admin')
+    .expect(getNthDialogOptionsOption(2).innerText).contains('Block @admin')
+    .click(getNthDialogOptionsOption(2))
+    .expect(modalDialog.exists).notOk()
+    .click(communityNavButton)
+    .click($('a[href="/blocked"]'))
+    .expect(getNthSearchResult(1).innerText).contains('@admin')
+    .click(getNthSearchResult(1))
+    .expect(getUrl()).contains('/accounts/1')
+    .expect(accountProfileFollowedBy.innerText).match(/blocked/i)
+    .expect(accountProfileFollowButton.getAttribute('aria-label')).eql('Unblock')
+    .click(accountProfileFollowButton)
+    .expect(accountProfileFollowedBy.innerText).contains('')
+    .expect(accountProfileFollowButton.getAttribute('aria-label')).eql('Follow')
+})
+
+test('Can block and unblock an account from the account profile page', async t => {
+  await t.useRole(foobarRole)
+    .navigateTo('/accounts/5')
+    .expect(accountProfileFollowButton.getAttribute('aria-label')).eql('Follow')
+    .click(accountProfileMoreOptionsButton)
+    .expect(getNthDialogOptionsOption(1).innerText).contains('Mention @baz')
+    .expect(getNthDialogOptionsOption(2).innerText).contains('Block @baz')
+    .click(getNthDialogOptionsOption(2))
+    .expect(accountProfileFollowedBy.innerText).match(/blocked/i)
+    .expect(accountProfileFollowButton.getAttribute('aria-label')).eql('Unblock')
+    .click(accountProfileFollowButton)
+    .expect(accountProfileFollowedBy.innerText).contains('')
+    .expect(accountProfileFollowButton.getAttribute('aria-label')).eql('Follow')
+    .click(accountProfileFollowButton)
+    .expect(accountProfileFollowButton.getAttribute('aria-label')).eql('Unfollow')
+    .click(accountProfileFollowButton)
+    .expect(accountProfileFollowButton.getAttribute('aria-label')).eql('Follow')
+})
diff --git a/tests/utils.js b/tests/utils.js
index 4c5bf82e..94d1479b 100644
--- a/tests/utils.js
+++ b/tests/utils.js
@@ -13,6 +13,7 @@ export const notificationsNavButton = $('nav a[href="/notifications"]')
 export const homeNavButton = $('nav a[href="/"]')
 export const localTimelineNavButton = $('nav a[href="/local"]')
 export const searchNavButton = $('nav a[href="/search"]')
+export const communityNavButton = $('nav a[href="/community"]')
 export const formError = $('.form-error-user-error')
 export const composeInput = $('.compose-box-input')
 export const composeContentWarning = $('.content-warning-input')
@@ -34,6 +35,7 @@ export const accountProfileUsername = $('.account-profile .account-profile-usern
 export const accountProfileFollowedBy = $('.account-profile .account-profile-followed-by')
 export const accountProfileFollowButton = $('.account-profile .account-profile-follow button')
 export const goBackButton = $('.dynamic-page-go-back')
+export const accountProfileMoreOptionsButton = $('.account-profile-more-options button')
 
 export const favoritesCountElement = $('.status-favs-reblogs:nth-child(3)').addCustomDOMProperties({
   innerCount: el => parseInt(el.innerText, 10)
@@ -169,6 +171,10 @@ export function getNthFavoriteButton (n) {
   return getNthStatus(n).find('.status-toolbar button:nth-child(3)')
 }
 
+export function getNthStatusOptionsButton (n) {
+  return getNthStatus(n).find('.status-toolbar button:nth-child(4)')
+}
+
 export function getNthFavorited (n) {
   return getNthFavoriteButton(n).getAttribute('aria-pressed')
 }
@@ -189,6 +195,10 @@ export function getNthReblogged (n) {
   return getNthReblogButton(n).getAttribute('aria-pressed')
 }
 
+export function getNthDialogOptionsOption (n) {
+  return $(`.modal-dialog li:nth-child(${n}) button`)
+}
+
 export function getReblogsCount () {
   return reblogsCountElement.innerCount
 }