diff --git a/ui/src/Components/Grid/AlertGrid/AlertGroup/Alert/index.js b/ui/src/Components/Grid/AlertGrid/AlertGroup/Alert/index.js
index 20317401b..650582ea7 100644
--- a/ui/src/Components/Grid/AlertGrid/AlertGroup/Alert/index.js
+++ b/ui/src/Components/Grid/AlertGrid/AlertGroup/Alert/index.js
@@ -45,18 +45,35 @@ const Alert = observer(
         BorderClassMap[alert.state] || "border-warning"
       ];
 
+      let silences = {};
+      for (let am of alert.alertmanager) {
+        if (!silences[am.cluster]) {
+          silences[am.cluster] = {
+            alertmanager: am,
+            silences: []
+          };
+        }
+        for (let silenceID of am.silencedBy) {
+          if (!silences[am.cluster].silences.includes(silenceID)) {
+            silences[am.cluster].silences.push(silenceID);
+          }
+        }
+      }
+
       return (
         <li className={classNames.join(" ")}>
           <div>
-            {alert.annotations.filter(a => a.isLink === false).map(a => (
-              <RenderNonLinkAnnotation
-                key={a.name}
-                name={a.name}
-                value={a.value}
-                visible={a.visible}
-                afterUpdate={afterUpdate}
-              />
-            ))}
+            {alert.annotations
+              .filter(a => a.isLink === false)
+              .map(a => (
+                <RenderNonLinkAnnotation
+                  key={a.name}
+                  name={a.name}
+                  value={a.value}
+                  visible={a.visible}
+                  afterUpdate={afterUpdate}
+                />
+              ))}
           </div>
           <AlertMenu
             group={group}
@@ -81,15 +98,21 @@ const Alert = observer(
               value={alert.receiver}
             />
           ) : null}
-          {alert.annotations.filter(a => a.isLink === true).map(a => (
-            <RenderLinkAnnotation key={a.name} name={a.name} value={a.value} />
-          ))}
-          {alert.alertmanager.map(am =>
-            am.silencedBy.map(silenceID => (
+          {alert.annotations
+            .filter(a => a.isLink === true)
+            .map(a => (
+              <RenderLinkAnnotation
+                key={a.name}
+                name={a.name}
+                value={a.value}
+              />
+            ))}
+          {Object.values(silences).map(clusterSilences =>
+            clusterSilences.silences.map(silenceID => (
               <Silence
                 key={silenceID}
                 silenceFormStore={silenceFormStore}
-                alertmanagerState={am}
+                alertmanagerState={clusterSilences.alertmanager}
                 silenceID={silenceID}
                 afterUpdate={afterUpdate}
               />
diff --git a/ui/src/Components/Grid/AlertGrid/AlertGroup/Alert/index.test.js b/ui/src/Components/Grid/AlertGrid/AlertGroup/Alert/index.test.js
index 0f40aff00..f5efc1a1b 100644
--- a/ui/src/Components/Grid/AlertGrid/AlertGroup/Alert/index.test.js
+++ b/ui/src/Components/Grid/AlertGrid/AlertGroup/Alert/index.test.js
@@ -96,6 +96,35 @@ describe("<Alert />", () => {
     expect(silence.html()).toMatch(/silence123456789/);
   });
 
+  it("renders only one silence for HA cluster", () => {
+    const alert = MockedAlert();
+    alert.alertmanager = [
+      {
+        name: "am1",
+        cluster: "ha",
+        state: "suppressed",
+        startsAt: "2018-08-14T17:36:40.017867056Z",
+        endsAt: "0001-01-01T00:00:00Z",
+        source: "localhost/am1",
+        silencedBy: ["silence123456789"]
+      },
+      {
+        name: "am2",
+        cluster: "ha",
+        state: "suppressed",
+        startsAt: "2018-08-14T17:36:40.017867056Z",
+        endsAt: "0001-01-01T00:00:00Z",
+        source: "localhost/am2",
+        silencedBy: ["silence123456789"]
+      }
+    ];
+    const group = MockAlertGroup({}, [alert], [], {});
+    const tree = MountedAlert(alert, group, false, false);
+    const silence = tree.find("Silence");
+    expect(silence).toHaveLength(1);
+    expect(silence.html()).toMatch(/silence123456789/);
+  });
+
   it("uses BorderClassMap.active when @state=active", () => {
     const alert = MockedAlert();
     alert.state = "active";
diff --git a/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.js b/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.js
index 4e26a0e13..97f1c6262 100644
--- a/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.js
+++ b/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.js
@@ -249,7 +249,7 @@ const Silence = inject("alertStore")(
         // and we need to lookup the actual silence data in the store.
         // Data might be missing from the store so first check if we have
         // anything for this alertmanager instance
-        const amSilences = alertStore.data.silences[alertmanagerState.name];
+        const amSilences = alertStore.data.silences[alertmanagerState.cluster];
         if (!amSilences) return null;
 
         // next check if alertmanager has our silence ID
diff --git a/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.test.js b/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.test.js
index e3a0c412f..7071ed80b 100644
--- a/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.test.js
+++ b/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.test.js
@@ -17,6 +17,7 @@ const mockAfterUpdate = jest.fn();
 
 const alertmanager = {
   name: "default",
+  cluster: "default",
   state: "suppressed",
   startsAt: "2000-01-01T10:00:00Z",
   endsAt: "0001-01-01T00:00:00Z",
diff --git a/ui/src/Models/API.js b/ui/src/Models/API.js
index d21ef96dd..3c295d48b 100644
--- a/ui/src/Models/API.js
+++ b/ui/src/Models/API.js
@@ -11,6 +11,7 @@ const Annotation = PropTypes.exact({
 
 const APIAlertAlertmanagerState = PropTypes.exact({
   name: PropTypes.string.isRequired,
+  cluster: PropTypes.string.isRequired,
   state: AlertState.isRequired,
   startsAt: PropTypes.string.isRequired,
   endsAt: PropTypes.string.isRequired,
diff --git a/ui/src/__mocks__/Alerts.js b/ui/src/__mocks__/Alerts.js
index 82b74eb77..3bc685d0e 100644
--- a/ui/src/__mocks__/Alerts.js
+++ b/ui/src/__mocks__/Alerts.js
@@ -14,6 +14,7 @@ const MockAlert = (annotations, labels, state) => ({
   alertmanager: [
     {
       name: "default",
+      cluster: "default",
       state: "active",
       startsAt: "2018-08-14T17:36:40.017867056Z",
       endsAt: "0001-01-01T00:00:00Z",