diff --git a/packages/compass-crud/src/index.ts b/packages/compass-crud/src/index.ts
index 36ca93f22da..42cb8989995 100644
--- a/packages/compass-crud/src/index.ts
+++ b/packages/compass-crud/src/index.ts
@@ -83,3 +83,6 @@ export type { DocumentListViewProps } from './components/document-list-view';
 export { default as DocumentListView } from './components/document-list-view';
 export type { DocumentJsonViewProps } from './components/document-json-view';
 export { default as DocumentJsonView } from './components/document-json-view';
+
+// Export utility functions for use by other packages
+export { fetchShardingKeys } from './utils';
diff --git a/packages/compass-indexes/src/components/regular-indexes-table/property-field.tsx b/packages/compass-indexes/src/components/regular-indexes-table/property-field.tsx
index 9c36e1ba7ad..f4baaf35fdb 100644
--- a/packages/compass-indexes/src/components/regular-indexes-table/property-field.tsx
+++ b/packages/compass-indexes/src/components/regular-indexes-table/property-field.tsx
@@ -63,14 +63,17 @@ type PropertyFieldProps = {
   cardinality?: RegularIndex['cardinality'];
   extra?: RegularIndex['extra'];
   properties: RegularIndex['properties'];
+  isShardKeyIndex?: boolean;
 };
 
 const HIDDEN_INDEX_TEXT = 'HIDDEN';
+const SHARD_KEY_INDEX_TEXT = 'SHARD KEY';
 
 const PropertyField: React.FunctionComponent<PropertyFieldProps> = ({
   extra,
   properties,
   cardinality,
+  isShardKeyIndex,
 }) => {
   return (
     <div className={containerStyles}>
@@ -85,6 +88,12 @@ const PropertyField: React.FunctionComponent<PropertyFieldProps> = ({
             />
           );
         })}
+      {isShardKeyIndex && (
+        <PropertyBadgeWithTooltip
+          text={SHARD_KEY_INDEX_TEXT}
+          link={getIndexHelpLink('shard-key') ?? '#'}
+        />
+      )}
       {cardinality === 'compound' && (
         <PropertyBadgeWithTooltip
           text={cardinality}
diff --git a/packages/compass-indexes/src/components/regular-indexes-table/regular-indexes-table.tsx b/packages/compass-indexes/src/components/regular-indexes-table/regular-indexes-table.tsx
index 5400668417c..004962941d6 100644
--- a/packages/compass-indexes/src/components/regular-indexes-table/regular-indexes-table.tsx
+++ b/packages/compass-indexes/src/components/regular-indexes-table/regular-indexes-table.tsx
@@ -369,6 +369,7 @@ function getRegularIndexInfo(
         cardinality={index.cardinality}
         extra={index.extra}
         properties={index.properties}
+        isShardKeyIndex={index.isShardKeyIndex}
       />
     ),
     status: <StatusField status={status} />,
diff --git a/packages/compass-indexes/src/modules/regular-indexes.ts b/packages/compass-indexes/src/modules/regular-indexes.ts
index 661ea04d5c4..1bb6926a80e 100644
--- a/packages/compass-indexes/src/modules/regular-indexes.ts
+++ b/packages/compass-indexes/src/modules/regular-indexes.ts
@@ -1,10 +1,11 @@
 import { isEqual, pick } from 'lodash';
-import type { IndexDefinition } from 'mongodb-data-service';
+import type { IndexDefinition, DataService } from 'mongodb-data-service';
 import type { AnyAction } from 'redux';
 import {
   openToast,
   showConfirmation as showConfirmationModal,
 } from '@mongodb-js/compass-components';
+import { fetchShardingKeys } from '@mongodb-js/compass-crud';
 
 import { FetchStatuses, NOT_FETCHABLE_STATUSES } from '../utils/fetch-status';
 import type { FetchStatus } from '../utils/fetch-status';
@@ -37,7 +38,9 @@ export type RegularIndex = Partial<IndexDefinition> &
     | 'relativeSize'
     | 'usageCount'
     | 'buildProgress'
-  >;
+  > & {
+    isShardKeyIndex?: boolean;
+  };
 
 export type InProgressIndex = Pick<IndexDefinition, 'name' | 'fields'> & {
   id: string;
@@ -379,6 +382,28 @@ function pickCollectionStatFields(state: RootState) {
   );
 }
 
+/**
+ * Determines if an index is built on shard key fields by comparing
+ * the index fields with the shard key fields.
+ */
+function isIndexOnShardKey(
+  indexFields: IndexDefinition['fields'],
+  shardKey: Record<string, unknown>
+): boolean {
+  if (!shardKey || Object.keys(shardKey).length === 0) {
+    return false;
+  }
+
+  const shardKeyFields = Object.keys(shardKey);
+  const indexFieldNames = indexFields.map((field) => field.field);
+
+  // Check if index starts with shard key fields (prefix match)
+  // This covers both exact shard key indexes and compound indexes that include the shard key
+  return shardKeyFields.every(
+    (field, index) => indexFieldNames[index] === field
+  );
+}
+
 const fetchIndexes = (
   reason: FetchReason
 ): IndexesThunkAction<Promise<void>, FetchIndexesActions> => {
@@ -426,10 +451,25 @@ const fetchIndexes = (
         shouldFetchRollingIndexes
           ? rollingIndexesService.listRollingIndexes(namespace)
           : undefined,
-      ] as [Promise<IndexDefinition[]>, Promise<AtlasIndexStats[]> | undefined];
-      const [indexes, rollingIndexes] = await Promise.all(promises);
+        // Fetch shard key information to identify shard key indexes
+        fetchShardingKeys(dataService as DataService, namespace, {
+          signal: new AbortController().signal,
+        }).catch(() => ({})),
+      ] as [
+        Promise<IndexDefinition[]>,
+        Promise<AtlasIndexStats[]> | undefined,
+        Promise<Record<string, unknown>>
+      ];
+      const [indexes, rollingIndexes, shardKey] = await Promise.all(promises);
+
+      // Mark indexes that are built on shard key fields
+      const indexesWithShardKeyInfo = indexes.map((index) => ({
+        ...index,
+        isShardKeyIndex: isIndexOnShardKey(index.fields, shardKey),
+      }));
+
       const indexesBefore = pickCollectionStatFields(getState());
-      dispatch(fetchIndexesSucceeded(indexes, rollingIndexes));
+      dispatch(fetchIndexesSucceeded(indexesWithShardKeyInfo, rollingIndexes));
       const indexesAfter = pickCollectionStatFields(getState());
       if (
         reason !== FetchReasons.INITIAL_FETCH &&
diff --git a/packages/compass-indexes/src/stores/store.ts b/packages/compass-indexes/src/stores/store.ts
index 5e547467495..4b87040baa3 100644
--- a/packages/compass-indexes/src/stores/store.ts
+++ b/packages/compass-indexes/src/stores/store.ts
@@ -50,7 +50,10 @@ export type IndexesDataServiceProps =
   | 'collectionStats'
   | 'collectionInfo'
   | 'listCollections'
-  | 'isListSearchIndexesSupported';
+  | 'isListSearchIndexesSupported'
+  // Required for shard key detection
+  | 'find'
+  | 'isCancelError';
 export type IndexesDataService = Pick<DataService, IndexesDataServiceProps>;
 
 export type IndexesPluginServices = {
diff --git a/packages/compass-indexes/src/utils/index-link-helper.ts b/packages/compass-indexes/src/utils/index-link-helper.ts
index 50c896dce7c..4f256203542 100644
--- a/packages/compass-indexes/src/utils/index-link-helper.ts
+++ b/packages/compass-indexes/src/utils/index-link-helper.ts
@@ -22,6 +22,7 @@ const HELP_URLS = {
     'https://docs.mongodb.com/master/reference/bson-type-comparison-order/#collation',
   COLLATION_REF: 'https://docs.mongodb.com/master/reference/collation',
   HIDDEN: 'https://www.mongodb.com/docs/manual/core/index-hidden/',
+  'SHARD-KEY': 'https://www.mongodb.com/docs/manual/core/sharding-shard-key/',
   UNKNOWN: null,
 };
 
diff --git a/packages/compass-indexes/test/setup-store.ts b/packages/compass-indexes/test/setup-store.ts
index e0034988b0b..7d3aff1a7db 100644
--- a/packages/compass-indexes/test/setup-store.ts
+++ b/packages/compass-indexes/test/setup-store.ts
@@ -90,6 +90,15 @@ const NOOP_DATA_PROVIDER: IndexesDataService = {
   sample(namespace: string) {
     return Promise.resolve([]);
   },
+  // Required for shard key detection
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  find(ns: string, filter: unknown, options: unknown) {
+    return Promise.resolve([]);
+  },
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  isCancelError(error: unknown) {
+    return false;
+  },
 };
 
 class FakeInstance extends EventEmitter {