diff --git a/app/_locales/en/messages.json b/app/_locales/en/messages.json
index 84e58b2b9..f73b5b23e 100644
--- a/app/_locales/en/messages.json
+++ b/app/_locales/en/messages.json
@@ -1553,6 +1553,12 @@
   "usedByClients": {
     "message": "Used by a variety of different clients"
   },
+  "usePhishingDetection": {
+    "message": "Use Phishing Detection"
+  },
+  "usePhishingDetectionDescription": {
+    "message": "Display a warning for phishing domains targeting Ethereum users"
+  },
   "userName": {
     "message": "Username"
   },
diff --git a/app/scripts/controllers/preferences.js b/app/scripts/controllers/preferences.js
index e692dbda1..ab539e8fd 100644
--- a/app/scripts/controllers/preferences.js
+++ b/app/scripts/controllers/preferences.js
@@ -36,6 +36,7 @@ class PreferencesController {
       suggestedTokens: {},
       useBlockie: false,
       useNonceField: false,
+      usePhishDetect: true,
 
       // WARNING: Do not use feature flags for security-sensitive things.
       // Feature flag toggling is available in the global namespace
@@ -103,6 +104,16 @@ class PreferencesController {
     this.store.updateState({ useNonceField: val })
   }
 
+  /**
+   * Setter for the `usePhishDetect` property
+   *
+   * @param {boolean} val - Whether or not the user prefers phishing domain protection
+   *
+   */
+  setUsePhishDetect (val) {
+    this.store.updateState({ usePhishDetect: val })
+  }
+
   /**
    * Setter for the `participateInMetaMetrics` property
    *
diff --git a/app/scripts/metamask-controller.js b/app/scripts/metamask-controller.js
index c7f2dc351..327a325ba 100644
--- a/app/scripts/metamask-controller.js
+++ b/app/scripts/metamask-controller.js
@@ -446,6 +446,7 @@ export default class MetamaskController extends EventEmitter {
       setCurrentCurrency: this.setCurrentCurrency.bind(this),
       setUseBlockie: this.setUseBlockie.bind(this),
       setUseNonceField: this.setUseNonceField.bind(this),
+      setUsePhishDetect: this.setUsePhishDetect.bind(this),
       setIpfsGateway: this.setIpfsGateway.bind(this),
       setParticipateInMetaMetrics: this.setParticipateInMetaMetrics.bind(this),
       setMetaMetricsSendCount: this.setMetaMetricsSendCount.bind(this),
@@ -1470,9 +1471,10 @@ export default class MetamaskController extends EventEmitter {
    * @param {MessageSender} sender - The sender of the messages on this stream
    */
   setupUntrustedCommunication (connectionStream, sender) {
+    const { usePhishDetect } = this.preferencesController.store.getState()
     const hostname = (new URL(sender.url)).hostname
-    // Check if new connection is blacklisted
-    if (this.phishingController.test(hostname)) {
+    // Check if new connection is blacklisted if phishing detection is on
+    if (usePhishDetect && this.phishingController.test(hostname)) {
       log.debug('MetaMask - sending phishing warning for', hostname)
       this.sendPhishingWarning(connectionStream, hostname)
       return
@@ -1988,6 +1990,20 @@ export default class MetamaskController extends EventEmitter {
     }
   }
 
+  /**
+   * Sets whether or not to use phishing detection.
+   * @param {boolean} val
+   * @param {Function} cb
+   */
+  setUsePhishDetect (val, cb) {
+    try {
+      this.preferencesController.setUsePhishDetect(val)
+      cb(null)
+    } catch (err) {
+      cb(err)
+    }
+  }
+
   /**
    * Sets the IPFS gateway to use for ENS content resolution.
    * @param {string} val - the host of the gateway to set
diff --git a/test/e2e/fixtures/imported-account/state.json b/test/e2e/fixtures/imported-account/state.json
index 4bf97d646..64d7dbdd3 100644
--- a/test/e2e/fixtures/imported-account/state.json
+++ b/test/e2e/fixtures/imported-account/state.json
@@ -110,7 +110,8 @@
       "suggestedTokens": {},
       "tokens": [],
       "useBlockie": false,
-      "useNonceField": false
+      "useNonceField": false,
+      "usePhishDetect": true
     },
     "config": {},
     "firstTimeInfo": {
diff --git a/test/unit/app/controllers/preferences-controller-test.js b/test/unit/app/controllers/preferences-controller-test.js
index d81453e37..66d3f4872 100644
--- a/test/unit/app/controllers/preferences-controller-test.js
+++ b/test/unit/app/controllers/preferences-controller-test.js
@@ -543,5 +543,17 @@ describe('preferences controller', function () {
       assert.deepEqual(preferencesController.store.getState().frequentRpcListDetail, [])
     })
   })
-})
 
+  describe('setUsePhishDetect', function () {
+    it('should default to true', function () {
+      const state = preferencesController.store.getState()
+      assert.equal(state.usePhishDetect, true)
+    })
+
+    it('should set the usePhishDetect property in state', function () {
+      assert.equal(preferencesController.store.getState().usePhishDetect, true)
+      preferencesController.setUsePhishDetect(false)
+      assert.equal(preferencesController.store.getState().usePhishDetect, false)
+    })
+  })
+})
diff --git a/ui/app/pages/settings/security-tab/security-tab.component.js b/ui/app/pages/settings/security-tab/security-tab.component.js
index f79fc5227..cb3da6c1a 100644
--- a/ui/app/pages/settings/security-tab/security-tab.component.js
+++ b/ui/app/pages/settings/security-tab/security-tab.component.js
@@ -13,10 +13,12 @@ export default class SecurityTab extends PureComponent {
   static propTypes = {
     warning: PropTypes.string,
     history: PropTypes.object,
-    participateInMetaMetrics: PropTypes.bool,
-    setParticipateInMetaMetrics: PropTypes.func,
-    showIncomingTransactions: PropTypes.bool,
-    setShowIncomingTransactionsFeatureFlag: PropTypes.func,
+    participateInMetaMetrics: PropTypes.bool.isRequired,
+    setParticipateInMetaMetrics: PropTypes.func.isRequired,
+    showIncomingTransactions: PropTypes.bool.isRequired,
+    setShowIncomingTransactionsFeatureFlag: PropTypes.func.isRequired,
+    setUsePhishDetect: PropTypes.func.isRequired,
+    usePhishDetect: PropTypes.bool.isRequired,
   }
 
   renderSeedWords () {
@@ -105,6 +107,32 @@ export default class SecurityTab extends PureComponent {
     )
   }
 
+  renderPhishingDetectionToggle () {
+    const { t } = this.context
+    const { usePhishDetect, setUsePhishDetect } = this.props
+
+    return (
+      <div className="settings-page__content-row">
+        <div className="settings-page__content-item">
+          <span>{ t('usePhishingDetection') }</span>
+          <div className="settings-page__content-description">
+            { t('usePhishingDetectionDescription') }
+          </div>
+        </div>
+        <div className="settings-page__content-item">
+          <div className="settings-page__content-item-col">
+            <ToggleButton
+              value={usePhishDetect}
+              onToggle={(value) => setUsePhishDetect(!value)}
+              offLabel={t('off')}
+              onLabel={t('on')}
+            />
+          </div>
+        </div>
+      </div>
+    )
+  }
+
   renderContent () {
     const { warning } = this.props
 
@@ -113,6 +141,7 @@ export default class SecurityTab extends PureComponent {
         { warning && <div className="settings-tab__error">{ warning }</div> }
         { this.renderSeedWords() }
         { this.renderIncomingTransactionsOptIn() }
+        { this.renderPhishingDetectionToggle() }
         { this.renderMetaMetricsOptIn() }
       </div>
     )
diff --git a/ui/app/pages/settings/security-tab/security-tab.container.js b/ui/app/pages/settings/security-tab/security-tab.container.js
index 56e9ad495..138419913 100644
--- a/ui/app/pages/settings/security-tab/security-tab.container.js
+++ b/ui/app/pages/settings/security-tab/security-tab.container.js
@@ -5,6 +5,7 @@ import { withRouter } from 'react-router-dom'
 import {
   setFeatureFlag,
   setParticipateInMetaMetrics,
+  setUsePhishDetect,
 } from '../../../store/actions'
 
 const mapStateToProps = (state) => {
@@ -14,12 +15,14 @@ const mapStateToProps = (state) => {
       showIncomingTransactions,
     } = {},
     participateInMetaMetrics,
+    usePhishDetect,
   } = metamask
 
   return {
     warning,
     showIncomingTransactions,
     participateInMetaMetrics,
+    usePhishDetect,
   }
 }
 
@@ -27,6 +30,7 @@ const mapDispatchToProps = (dispatch) => {
   return {
     setParticipateInMetaMetrics: (val) => dispatch(setParticipateInMetaMetrics(val)),
     setShowIncomingTransactionsFeatureFlag: (shouldShow) => dispatch(setFeatureFlag('showIncomingTransactions', shouldShow)),
+    setUsePhishDetect: (val) => dispatch(setUsePhishDetect(val)),
   }
 }
 
diff --git a/ui/app/pages/settings/security-tab/tests/security-tab.test.js b/ui/app/pages/settings/security-tab/tests/security-tab.test.js
index 80b8f3b06..3dff3b9ac 100644
--- a/ui/app/pages/settings/security-tab/tests/security-tab.test.js
+++ b/ui/app/pages/settings/security-tab/tests/security-tab.test.js
@@ -19,6 +19,8 @@ describe('Security Tab', function () {
     privacyMode: true,
     warning: '',
     participateInMetaMetrics: false,
+    setUsePhishDetect: sinon.spy(),
+    usePhishDetect: true,
   }
 
   beforeEach(function () {
@@ -46,8 +48,14 @@ describe('Security Tab', function () {
     assert(props.setShowIncomingTransactionsFeatureFlag.calledOnce)
   })
 
+  it('toggles phishing detection', function () {
+    const phishDetect = wrapper.find({ type: 'checkbox' }).at(1)
+    phishDetect.simulate('click')
+    assert(props.setUsePhishDetect.calledOnce)
+  })
+
   it('toggles metaMetrics', function () {
-    const metaMetrics = wrapper.find({ type: 'checkbox' }).at(1)
+    const metaMetrics = wrapper.find({ type: 'checkbox' }).at(2)
 
     metaMetrics.simulate('click')
     assert(props.setParticipateInMetaMetrics.calledOnce)
diff --git a/ui/app/selectors/selectors.js b/ui/app/selectors/selectors.js
index 12c1a25ee..b0aaa9df8 100644
--- a/ui/app/selectors/selectors.js
+++ b/ui/app/selectors/selectors.js
@@ -349,6 +349,10 @@ export function getUseNonceField (state) {
   return Boolean(state.metamask.useNonceField)
 }
 
+export function getUsePhishDetect (state) {
+  return Boolean(state.metamask.usePhishDetect)
+}
+
 export function getCustomNonceValue (state) {
   return String(state.metamask.customNonceValue)
 }
diff --git a/ui/app/store/actions.js b/ui/app/store/actions.js
index 08c41cb24..68feec060 100644
--- a/ui/app/store/actions.js
+++ b/ui/app/store/actions.js
@@ -2125,6 +2125,19 @@ export function setUseNonceField (val) {
   }
 }
 
+export function setUsePhishDetect (val) {
+  return (dispatch) => {
+    dispatch(showLoadingIndication())
+    log.debug(`background.setUsePhishDetect`)
+    background.setUsePhishDetect(val, (err) => {
+      dispatch(hideLoadingIndication())
+      if (err) {
+        return dispatch(displayWarning(err.message))
+      }
+    })
+  }
+}
+
 export function setIpfsGateway (val) {
   return (dispatch) => {
     dispatch(showLoadingIndication())