diff --git a/change/@fluentui-react-charts-f07461ee-762b-4537-be4e-14c40f6113f8.json b/change/@fluentui-react-charts-f07461ee-762b-4537-be4e-14c40f6113f8.json
new file mode 100644
index 00000000000000..1b6dcfd1c6c897
--- /dev/null
+++ b/change/@fluentui-react-charts-f07461ee-762b-4537-be4e-14c40f6113f8.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Marker size issue in scatter chart and line chart",
+  "packageName": "@fluentui/react-charts",
+  "email": "yushsingla@microsoft.com",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/charts/react-charts/library/src/components/LineChart/LineChart.tsx b/packages/charts/react-charts/library/src/components/LineChart/LineChart.tsx
index e7139a619fb2cb..9cdbe4e1a8dbb2 100644
--- a/packages/charts/react-charts/library/src/components/LineChart/LineChart.tsx
+++ b/packages/charts/react-charts/library/src/components/LineChart/LineChart.tsx
@@ -68,6 +68,8 @@ const bisect = bisector((d: any) => d.x).left;
 const DEFAULT_LINE_STROKE_SIZE = 4;
 // The given shape of a icon must be 2.5 times bigger than line width (known as stroke width)
 const PATH_MULTIPLY_SIZE = 2.5;
+// Scale factor to reduce marker sizes (0.6 = 60% of calculated size)
+const MARKER_SIZE_SCALE_FACTOR = 0.6;
 
 /**
  *
@@ -549,7 +551,7 @@ export const LineChart: React.FunctionComponent<LineChartProps> = React.forwardR
               xScaleType: props.xScaleType,
               yScaleType: props.yScaleType,
               secondaryYScaleType: props.secondaryYScaleType,
-            })
+            }) * MARKER_SIZE_SCALE_FACTOR
           : 0;
         if (_points[i].data.length === 1) {
           const {
diff --git a/packages/charts/react-charts/library/src/components/ScatterChart/ScatterChart.tsx b/packages/charts/react-charts/library/src/components/ScatterChart/ScatterChart.tsx
index 41f9dc4ac3561d..bec764ea4368a6 100644
--- a/packages/charts/react-charts/library/src/components/ScatterChart/ScatterChart.tsx
+++ b/packages/charts/react-charts/library/src/components/ScatterChart/ScatterChart.tsx
@@ -54,6 +54,9 @@ import { useImageExport } from '../../utilities/hooks';
 
 type NumericAxis = D3Axis<number | { valueOf(): number }>;
 
+// Scale factor to reduce marker sizes (0.6 = 60% of calculated size)
+const MARKER_SIZE_SCALE_FACTOR = 0.6;
+
 type ScatterChartDataWithIndex = ScatterChartPoints & { index: number };
 
 // Create a ScatterChart variant which uses these default styles and this styled subcomponent.
@@ -421,7 +424,7 @@ export const ScatterChart: React.FunctionComponent<ScatterChartProps> = React.fo
 
         if (pointMarkerSize) {
           if (isContinuousXY && maxMarkerSize !== 0) {
-            circleRadius = (pointMarkerSize * extraMaxPixels) / maxMarkerSize;
+            circleRadius = (pointMarkerSize * extraMaxPixels * MARKER_SIZE_SCALE_FACTOR) / maxMarkerSize;
           } else if (!isContinuousXY && maxMarkerSize !== minMarkerSize) {
             circleRadius =
               minPixel + ((pointMarkerSize - minMarkerSize) / (maxMarkerSize - minMarkerSize)) * (maxPixel - minPixel);