<!--
{
  "availability" : [
    "iOS: 11.0.0 -",
    "iPadOS: 11.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.13.0 -",
    "tvOS: 11.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "MapKit",
  "identifier" : "/documentation/MapKit/MKClusterAnnotation/subtitle",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "MapKit"
    ],
    "preciseIdentifier" : "c:objc(cs)MKClusterAnnotation(py)subtitle"
  },
  "title" : "subtitle"
}
-->

# subtitle

The subtitle string to display for the group of annotations.

```
var subtitle: String? { get set }
```

## Discussion

The cluster annotation object sets this property to a string that conveys how many additional annotations the group includes, except for the annotation with the title that the [`title`](/documentation/MapKit/MKClusterAnnotation/title) property displays.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)