# Custom Marker Clusters

#### Customizing the Clustered Markers

As an option to MarkerClusterGroup you can provide your own function for creating the Icon for the clustered markers. You'll probably want to use `getChildCount()` or `getAllChildMarkers()` to work out the icon to show.

{% embed url="<https://codesandbox.io/s/beautiful-pike-j2l0w?fontsize=14&hidenavigation=1&theme=dark&view=preview>" %}

&#x20;[![](https://codesandbox.io/static/img/play-codesandbox.svg)](https://codesandbox.io/s/beautiful-pike-j2l0w?fontsize=14\&hidenavigation=1\&theme=dark\&view=preview)

```jsx
import React from 'react'
import { MapContainer, Marker, TileLayer } from 'react-leaflet'
import L, { MarkerCluster } from 'leaflet'
import MarkerClusterGroup from '../../../src'
import 'leaflet/dist/leaflet.css'
import '../style.css'

const customIcon = new L.Icon({
  iconUrl: require('../images/location.svg').default,
  iconSize: new L.Point(40, 47),
})

// NOTE: iconCreateFunction is running by leaflet, which is not support ES6 arrow func syntax
// eslint-disable-next-line
const createClusterCustomIcon = function (cluster: MarkerCluster) {
  return L.divIcon({
    html: `<span>${cluster.getChildCount()}</span>`,
    className: 'custom-marker-cluster',
    iconSize: L.point(33, 33, true),
  })
}

export const Example1 = () => {
  return (
    <div>
      <h1>Custom Marker Cluster</h1>
      <MapContainer
        style={{ height: '500px' }}
        center={[38.9637, 35.2433]}
        zoom={4}
        scrollWheelZoom={true}
      >
        <TileLayer
          attribution='&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
          url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
        />
        <MarkerClusterGroup
          onClick={(e) => console.log('onClick', e)}
          iconCreateFunction={createClusterCustomIcon}
          maxClusterRadius={150}
          spiderfyOnMaxZoom={true}
          polygonOptions={{
            fillColor: '#ffffff',
            color: '#f00800',
            weight: 5,
            opacity: 1,
            fillOpacity: 0.8,
          }}
          showCoverageOnHover={true}
        >
          <Marker position={[36.668754, 29.104185]} icon={customIcon} />
          <Marker position={[40.587613, 36.944535]} icon={customIcon} />
          <Marker position={[40.614681, 43.121517]} icon={customIcon} />
          <Marker position={[38.357641, 38.328708]} icon={customIcon} />
          <Marker position={[41.051687, 28.987261]} title="a title" icon={customIcon} />
          <Marker position={[39.931841, 32.876713]} icon={customIcon} />
        </MarkerClusterGroup>
      </MapContainer>
    </div>
  )
}

```


---

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