diff --git a/integrationExamples/gpt/userId_example.html b/integrationExamples/gpt/userId_example.html
index 521eb8bc9fa..8e69bc6c6a7 100644
--- a/integrationExamples/gpt/userId_example.html
+++ b/integrationExamples/gpt/userId_example.html
@@ -83,9 +83,10 @@
         var adUnits = [
             {
                 code: 'test-div',
-                sizes: [[300,250],[300,600],[728,90]],
                 mediaTypes: {
-                    banner: {}
+                    banner: {
+                        sizes: [[300,250],[300,600],[728,90]]
+                    }
                 },
                 bids: [
                     {
@@ -216,10 +217,10 @@
                         name: "sharedid",
                         expires: 28
                       }
-                    },  
+                    },
                     {
                       name: 'lotamePanoramaId'
-                    }, 
+                    },
                     {
                       name: "liveIntentId",
                       params: {
@@ -230,7 +231,7 @@
                         name: "_li_pbid",
                         expires: 28
                       }
-                    }, 
+                    },
                     {
                         name: "zeotapIdPlus"
                     },
@@ -241,7 +242,10 @@
                             name: "haloId",
                             expires: 28
                         }
-                    } 
+                    },
+                    {
+                        name: "quantcastId"
+                    }
                     ],
                     syncDelay: 5000,
                     auctionDelay: 1000
diff --git a/modules/.submodules.json b/modules/.submodules.json
index 575c3294bf1..18e75dd1794 100644
--- a/modules/.submodules.json
+++ b/modules/.submodules.json
@@ -14,7 +14,8 @@
     "sharedIdSystem",
     "intentIqIdSystem",
     "zeotapIdPlusIdSystem",
-    "haloIdSystem"
+    "haloIdSystem",
+    "quantcastIdSystem"
   ],
   "adpod": [
     "freeWheelAdserverVideo",
diff --git a/modules/quantcastIdSystem.js b/modules/quantcastIdSystem.js
new file mode 100644
index 00000000000..e86c130dc5b
--- /dev/null
+++ b/modules/quantcastIdSystem.js
@@ -0,0 +1,44 @@
+/**
+ * This module adds QuantcastID to the User ID module
+ * The {@link module:modules/userId} module is required
+ * @module modules/quantcastIdSystem
+ * @requires module:modules/userId
+ */
+
+import {submodule} from '../src/hook.js'
+import { getStorageManager } from '../src/storageManager.js';
+
+const QUANTCAST_FPA = '__qca';
+
+export const storage = getStorageManager();
+
+/** @type {Submodule} */
+export const quantcastIdSubmodule = {
+  /**
+   * used to link submodule with config
+   * @type {string}
+   */
+  name: 'quantcastId',
+
+  /**
+   * decode the stored id value for passing to bid requests
+   * @function
+   * @returns {{quantcastId: string} | undefined}
+   */
+  decode(value) {
+    return value;
+  },
+
+  /**
+   * read Quantcast first party cookie and pass it along in quantcastId
+   * @function
+   * @returns {{id: {quantcastId: string} | undefined}}}
+   */
+  getId() {
+    // Consent signals are currently checked on the server side.
+    let fpa = storage.getCookie(QUANTCAST_FPA);
+    return { id: fpa ? { quantcastId: fpa } : undefined }
+  }
+};
+
+submodule('userId', quantcastIdSubmodule);
diff --git a/modules/userId/eids.js b/modules/userId/eids.js
index 65907370ad6..eebd0146d50 100644
--- a/modules/userId/eids.js
+++ b/modules/userId/eids.js
@@ -136,6 +136,12 @@ const USER_IDS_CONFIG = {
   'haloId': {
     source: 'audigent.com',
     atype: 1
+  },
+
+  // quantcastId
+  'quantcastId': {
+    source: 'quantcast.com',
+    atype: 1
   }
 };
 
diff --git a/modules/userId/eids.md b/modules/userId/eids.md
index e5dca014172..03aec46cf48 100644
--- a/modules/userId/eids.md
+++ b/modules/userId/eids.md
@@ -109,6 +109,13 @@ userIdAsEids = [
             id: 'some-random-id-value',
             atype: 1
         }]
+    },
+    {
+        source: 'quantcast.com',
+        uids: [{
+            id: 'some-random-id-value',
+            atype: 1
+        }]
     }
 ]
 ```
diff --git a/test/spec/modules/eids_spec.js b/test/spec/modules/eids_spec.js
index fdb5fc8005d..a6a44f9296d 100644
--- a/test/spec/modules/eids_spec.js
+++ b/test/spec/modules/eids_spec.js
@@ -222,6 +222,21 @@ describe('eids array generation for known sub-modules', function() {
       }]
     });
   });
+
+  it('quantcastId', function() {
+    const userId = {
+      quantcastId: 'some-random-id-value'
+    };
+    const newEids = createEidsArray(userId);
+    expect(newEids.length).to.equal(1);
+    expect(newEids[0]).to.deep.equal({
+      source: 'quantcast.com',
+      uids: [{
+        id: 'some-random-id-value',
+        atype: 1
+      }]
+    });
+  });
 });
 
 describe('Negative case', function() {
diff --git a/test/spec/modules/quantcastIdSystem_spec.js b/test/spec/modules/quantcastIdSystem_spec.js
new file mode 100644
index 00000000000..12c8689fd3f
--- /dev/null
+++ b/test/spec/modules/quantcastIdSystem_spec.js
@@ -0,0 +1,19 @@
+import { quantcastIdSubmodule, storage } from 'modules/quantcastIdSystem.js';
+
+describe('QuantcastId module', function () {
+  beforeEach(function() {
+    storage.setCookie('__qca', '', 'Thu, 01 Jan 1970 00:00:00 GMT');
+  });
+
+  it('getId() should return a quantcast id when the Quantcast first party cookie exists', function () {
+    storage.setCookie('__qca', 'P0-TestFPA');
+
+    const id = quantcastIdSubmodule.getId();
+    expect(id).to.be.deep.equal({id: {quantcastId: 'P0-TestFPA'}});
+  });
+
+  it('getId() should return an empty id when the Quantcast first party cookie is missing', function () {
+    const id = quantcastIdSubmodule.getId();
+    expect(id).to.be.deep.equal({id: undefined});
+  });
+});