diff --git a/packages/visx-xychart/src/components/series/AnimatedBarSeries.tsx b/packages/visx-xychart/src/components/series/AnimatedBarSeries.tsx
index 654629ee14..f2feecaebd 100644
--- a/packages/visx-xychart/src/components/series/AnimatedBarSeries.tsx
+++ b/packages/visx-xychart/src/components/series/AnimatedBarSeries.tsx
@@ -7,13 +7,27 @@ export default function AnimatedBarSeries<
   XScale extends AxisScale,
   YScale extends AxisScale,
   Datum extends object,
->({ colorAccessor, ...props }: Omit<BaseBarSeriesProps<XScale, YScale, Datum>, 'BarsComponent'>) {
+>({
+  colorAccessor,
+  radius,
+  radiusAll,
+  radiusTop,
+  radiusRight,
+  radiusBottom,
+  radiusLeft,
+  ...props
+}: Omit<BaseBarSeriesProps<XScale, YScale, Datum>, 'BarsComponent'>) {
   return (
     <BaseBarSeries<XScale, YScale, Datum>
       {...props}
       // @TODO currently generics for non-SeriesProps are not passed correctly in
       // withRegisteredData HOC
       colorAccessor={colorAccessor as BaseBarSeriesProps<XScale, YScale, object>['colorAccessor']}
+      radius={radius as BaseBarSeriesProps<XScale, YScale, object>['radius']}
+      radiusAll={radiusAll as BaseBarSeriesProps<XScale, YScale, object>['radiusAll']}
+      radiusTop={radiusTop as BaseBarSeriesProps<XScale, YScale, object>['radiusTop']}
+      radiusRight={radiusRight as BaseBarSeriesProps<XScale, YScale, object>['radiusRight']}
+      radiusBottom={radiusBottom as BaseBarSeriesProps<XScale, YScale, object>['radiusBottom']}
       BarsComponent={AnimatedBars}
     />
   );
diff --git a/packages/visx-xychart/src/components/series/BarSeries.tsx b/packages/visx-xychart/src/components/series/BarSeries.tsx
index 6768ef17a5..b0cac67c08 100644
--- a/packages/visx-xychart/src/components/series/BarSeries.tsx
+++ b/packages/visx-xychart/src/components/series/BarSeries.tsx
@@ -5,6 +5,12 @@ import Bars from './private/Bars';
 
 function BarSeries<XScale extends AxisScale, YScale extends AxisScale, Datum extends object>({
   colorAccessor,
+  radius,
+  radiusAll,
+  radiusTop,
+  radiusRight,
+  radiusBottom,
+  radiusLeft,
   ...props
 }: Omit<BaseBarSeriesProps<XScale, YScale, Datum>, 'BarsComponent'>) {
   return (
@@ -13,6 +19,11 @@ function BarSeries<XScale extends AxisScale, YScale extends AxisScale, Datum ext
       // @TODO currently generics for non-SeriesProps are not passed correctly in
       // withRegisteredData HOC
       colorAccessor={colorAccessor as BaseBarSeriesProps<XScale, YScale, object>['colorAccessor']}
+      radius={radius as BaseBarSeriesProps<XScale, YScale, object>['radius']}
+      radiusAll={radiusAll as BaseBarSeriesProps<XScale, YScale, object>['radiusAll']}
+      radiusTop={radiusTop as BaseBarSeriesProps<XScale, YScale, object>['radiusTop']}
+      radiusRight={radiusRight as BaseBarSeriesProps<XScale, YScale, object>['radiusRight']}
+      radiusBottom={radiusBottom as BaseBarSeriesProps<XScale, YScale, object>['radiusBottom']}
       BarsComponent={Bars}
     />
   );
diff --git a/packages/visx-xychart/src/components/series/private/AnimatedBars.tsx b/packages/visx-xychart/src/components/series/private/AnimatedBars.tsx
index 912caaa9aa..dbc6ecc991 100644
--- a/packages/visx-xychart/src/components/series/private/AnimatedBars.tsx
+++ b/packages/visx-xychart/src/components/series/private/AnimatedBars.tsx
@@ -7,7 +7,7 @@ import { cleanColor, colorHasUrl } from '../../../utils/cleanColorString';
 import getScaleBaseline from '../../../utils/getScaleBaseline';
 import AnimatedPath from './AnimatedPath';
 
-function enterUpdate({ x, y, width, height, fill }: Bar) {
+function enterUpdate<Datum extends object>({ x, y, width, height, fill }: Bar<Datum>) {
   return {
     x,
     y,
@@ -23,7 +23,7 @@ type BarTransitionConfig<Scale extends AxisScale> = {
   horizontal?: boolean;
 };
 
-function useBarTransitionConfig<Scale extends AxisScale>({
+function useBarTransitionConfig<Scale extends AxisScale, Datum extends object>({
   scale,
   horizontal,
 }: BarTransitionConfig<Scale>) {
@@ -31,7 +31,7 @@ function useBarTransitionConfig<Scale extends AxisScale>({
   return useMemo(() => {
     const scaleBaseline = getScaleBaseline(scale);
 
-    function fromLeave({ x, y, width, height, fill }: Bar) {
+    function fromLeave({ x, y, width, height, fill }: Bar<Datum>) {
       return {
         x: shouldAnimateX ? scaleBaseline ?? 0 : x,
         y: shouldAnimateX ? y : scaleBaseline ?? 0,
@@ -48,12 +48,16 @@ function useBarTransitionConfig<Scale extends AxisScale>({
       leave: fromLeave,
       enter: enterUpdate,
       update: enterUpdate,
-      keys: (bar: Bar) => bar.key,
+      keys: (bar: Bar<Datum>) => bar.key,
     };
   }, [scale, shouldAnimateX]);
 }
 
-function AnimatedBarsRounded<XScale extends AxisScale, YScale extends AxisScale>({
+function AnimatedBarsRounded<
+  XScale extends AxisScale,
+  YScale extends AxisScale,
+  Datum extends object,
+>({
   bars,
   xScale,
   yScale,
@@ -65,29 +69,30 @@ function AnimatedBarsRounded<XScale extends AxisScale, YScale extends AxisScale>
   radiusBottom,
   radiusLeft,
   ...pathProps
-}: BarsProps<XScale, YScale> & { radius: number }) {
+}: Omit<BarsProps<XScale, YScale, Datum>, 'radius'> &
+  Required<Pick<BarsProps<XScale, YScale, Datum>, 'radius'>>) {
   return (
     // eslint-disable-next-line react/jsx-no-useless-fragment
     <>
-      {bars.map(({ key, fill, x, y, width, height }) => (
+      {bars.map(({ key, ...barProps }) => (
         <BarRounded
           key={key}
-          x={x}
-          y={y}
-          width={width}
-          height={height}
-          radius={radius}
-          all={radiusAll}
-          top={radiusTop}
-          right={radiusRight}
-          bottom={radiusBottom}
-          left={radiusLeft}
+          x={barProps.x}
+          y={barProps.y}
+          width={barProps.width}
+          height={barProps.height}
+          radius={typeof radius === 'function' ? radius(barProps) : radius}
+          all={typeof radiusAll === 'function' ? radiusAll(barProps) : radiusAll}
+          top={typeof radiusTop === 'function' ? radiusTop(barProps) : radiusTop}
+          right={typeof radiusRight === 'function' ? radiusRight(barProps) : radiusRight}
+          bottom={typeof radiusBottom === 'function' ? radiusBottom(barProps) : radiusBottom}
+          left={typeof radiusLeft === 'function' ? radiusLeft(barProps) : radiusLeft}
         >
           {({ path }) => (
             <AnimatedPath
               className="visx-bar visx-bar-rounded"
               d={path}
-              fill={fill}
+              fill={barProps.fill}
               {...pathProps}
             />
           )}
@@ -97,7 +102,11 @@ function AnimatedBarsRounded<XScale extends AxisScale, YScale extends AxisScale>
   );
 }
 
-function AnimatedBarsUnrounded<XScale extends AxisScale, YScale extends AxisScale>({
+function AnimatedBarsUnrounded<
+  XScale extends AxisScale,
+  YScale extends AxisScale,
+  Datum extends object,
+>({
   bars,
   xScale,
   yScale,
@@ -109,7 +118,7 @@ function AnimatedBarsUnrounded<XScale extends AxisScale, YScale extends AxisScal
   radiusBottom,
   radiusLeft,
   ...rectProps
-}: BarsProps<XScale, YScale>) {
+}: BarsProps<XScale, YScale, Datum>) {
   const animatedBars = useTransition(bars, {
     ...useBarTransitionConfig({ horizontal, scale: horizontal ? xScale : yScale }),
   });
@@ -145,9 +154,11 @@ function AnimatedBarsUnrounded<XScale extends AxisScale, YScale extends AxisScal
 }
 
 /** Wrapper component which renders a Bars component depending on whether it needs rounded corners. */
-export default function AnimatedBars<XScale extends AxisScale, YScale extends AxisScale>(
-  props: BarsProps<XScale, YScale>,
-) {
+export default function AnimatedBars<
+  XScale extends AxisScale,
+  YScale extends AxisScale,
+  Datum extends object,
+>(props: BarsProps<XScale, YScale, Datum>) {
   return props.radius == null ? (
     <AnimatedBarsUnrounded {...props} />
   ) : (
diff --git a/packages/visx-xychart/src/components/series/private/Bars.tsx b/packages/visx-xychart/src/components/series/private/Bars.tsx
index c2eace6555..44f7bb5e09 100644
--- a/packages/visx-xychart/src/components/series/private/Bars.tsx
+++ b/packages/visx-xychart/src/components/series/private/Bars.tsx
@@ -4,7 +4,7 @@ import { BarRounded } from '@visx/shape';
 import React from 'react';
 import { BarsProps } from '../../../types';
 
-export default function Bars({
+export default function Bars<Datum extends object>({
   bars,
   horizontal,
   xScale,
@@ -16,7 +16,7 @@ export default function Bars({
   radiusBottom,
   radiusLeft,
   ...restProps
-}: BarsProps<AxisScale, AxisScale>) {
+}: BarsProps<AxisScale, AxisScale, Datum>) {
   const isFocusable = Boolean(restProps.onFocus || restProps.onBlur);
   return (
     <>
@@ -34,12 +34,12 @@ export default function Bars({
             key={key}
             className="visx-bar"
             tabIndex={isFocusable ? 0 : undefined}
-            radius={radius}
-            all={radiusAll}
-            top={radiusTop}
-            right={radiusRight}
-            bottom={radiusBottom}
-            left={radiusLeft}
+            radius={typeof radius === 'function' ? radius(barProps) : radius}
+            all={typeof radiusAll === 'function' ? radiusAll(barProps) : radiusAll}
+            top={typeof radiusTop === 'function' ? radiusTop(barProps) : radiusTop}
+            right={typeof radiusRight === 'function' ? radiusRight(barProps) : radiusRight}
+            bottom={typeof radiusBottom === 'function' ? radiusBottom(barProps) : radiusBottom}
+            left={typeof radiusLeft === 'function' ? radiusLeft(barProps) : radiusLeft}
             {...barProps}
             {...restProps}
           />
diff --git a/packages/visx-xychart/src/components/series/private/BaseBarGroup.tsx b/packages/visx-xychart/src/components/series/private/BaseBarGroup.tsx
index ef17c1d348..fa84b6bc22 100644
--- a/packages/visx-xychart/src/components/series/private/BaseBarGroup.tsx
+++ b/packages/visx-xychart/src/components/series/private/BaseBarGroup.tsx
@@ -31,7 +31,7 @@ export type BaseBarGroupProps<
   /** Comparator function to sort `dataKeys` within a bar group. By default the DOM rendering order of `BarGroup`s `children` is used. */
   sortBars?: (dataKeyA: string, dataKeyB: string) => number;
   /** Rendered component which is passed BarsProps by BaseBarGroup after processing. */
-  BarsComponent: React.FC<BarsProps<XScale, YScale>>;
+  BarsComponent: React.FC<BarsProps<XScale, YScale, Datum>>;
 } & Pick<
   SeriesProps<XScale, YScale, Datum>,
   | 'onPointerMove'
@@ -186,7 +186,7 @@ export default function BaseBarGroup<
             fill: colorAccessor?.(bar, index) ?? colorScale(key),
           };
         })
-        .filter((bar) => bar) as Bar[],
+        .filter((bar) => bar) as Bar<Datum>[],
     };
   });
 
diff --git a/packages/visx-xychart/src/components/series/private/BaseBarSeries.tsx b/packages/visx-xychart/src/components/series/private/BaseBarSeries.tsx
index 366f9da968..a7eea9f095 100644
--- a/packages/visx-xychart/src/components/series/private/BaseBarSeries.tsx
+++ b/packages/visx-xychart/src/components/series/private/BaseBarSeries.tsx
@@ -16,7 +16,7 @@ export type BaseBarSeriesProps<
   Datum extends object,
 > = SeriesProps<XScale, YScale, Datum> & {
   /** Rendered component which is passed BarsProps by BaseBarSeries after processing. */
-  BarsComponent: React.FC<BarsProps<XScale, YScale>>;
+  BarsComponent: React.FC<BarsProps<XScale, YScale, Datum>>;
   /**
    * Specify bar padding when bar thickness does not come from a `band` scale.
    * Accepted values are [0, 1], 0 = no padding, 1 = no bar, defaults to 0.1.
@@ -25,7 +25,7 @@ export type BaseBarSeriesProps<
   /** Given a Datum, returns its color. Falls back to theme color if unspecified or if a null-ish value is returned. */
   colorAccessor?: (d: Datum, index: number) => string | null | undefined;
 } & Pick<
-    BarsProps<XScale, YScale>,
+    BarsProps<XScale, YScale, Datum>,
     'radius' | 'radiusAll' | 'radiusTop' | 'radiusRight' | 'radiusBottom' | 'radiusLeft'
   >;
 
@@ -85,6 +85,7 @@ function BaseBarSeries<XScale extends AxisScale, YScale extends AxisScale, Datum
         if (!isValidNumber(barLength)) return null;
 
         return {
+          datum,
           key: `${index}`,
           x: horizontal ? xZeroPosition + Math.min(0, barLength) : x,
           y: horizontal ? y : yZeroPosition + Math.min(0, barLength),
@@ -93,7 +94,7 @@ function BaseBarSeries<XScale extends AxisScale, YScale extends AxisScale, Datum
           fill: colorAccessor?.(datum, index) ?? color,
         };
       })
-      .filter((bar) => bar) as Bar[];
+      .filter((bar) => bar) as Bar<Datum>[];
   }, [
     barThickness,
     color,
diff --git a/packages/visx-xychart/src/components/series/private/BaseBarStack.tsx b/packages/visx-xychart/src/components/series/private/BaseBarStack.tsx
index db159bc90f..add9a5db77 100644
--- a/packages/visx-xychart/src/components/series/private/BaseBarStack.tsx
+++ b/packages/visx-xychart/src/components/series/private/BaseBarStack.tsx
@@ -39,7 +39,7 @@ export type BaseBarStackProps<
     | React.ReactElement<BarStackChildProps<XScale, YScale, Datum>>
     | React.ReactElement<BarStackChildProps<XScale, YScale, Datum>>[];
   /** Rendered component which is passed BarsProps by BaseBarStack after processing. */
-  BarsComponent: React.FC<BarsProps<XScale, YScale>>;
+  BarsComponent: React.FC<BarsProps<XScale, YScale, Datum>>;
 } & Pick<StackPathConfig<Datum, string>, 'offset' | 'order'> &
   Pick<
     SeriesProps<XScale, YScale, Datum>,
@@ -192,7 +192,7 @@ function BaseBarStack<
                   : colorScale(barStack.key),
             };
           })
-          .filter((bar) => bar) as Bar[],
+          .filter((bar) => bar) as Bar<Datum>[],
       };
     })
     .filter((series) => series);
diff --git a/packages/visx-xychart/src/types/series.ts b/packages/visx-xychart/src/types/series.ts
index 2c249085a7..e523da7ef6 100644
--- a/packages/visx-xychart/src/types/series.ts
+++ b/packages/visx-xychart/src/types/series.ts
@@ -117,7 +117,9 @@ export type SeriesProps<
 };
 
 /** Bar shape. */
-export type Bar = {
+export type Bar<Datum extends object> = {
+  /** Datum being represented. */
+  datum: Datum;
   /** Unique key for Bar (not dataKey). */
   key: string;
   /** X coordinate of Bar. */
@@ -132,27 +134,33 @@ export type Bar = {
   fill?: string;
 };
 
+/** Given Bar props, returns the radius size of the bar. */
+export type BarsRadiusSizeFunc<Datum extends object> = (bar: Omit<Bar<Datum>, 'key'>) => number;
+
+/** Given Bar props, returns true if the radius should be applied, otherwise false. */
+export type BarsApplyRadiusFunc<Datum extends object> = (bar: Omit<Bar<Datum>, 'key'>) => boolean;
+
 /** Props for base Bars components */
-export type BarsProps<XScale extends AxisScale, YScale extends AxisScale> = {
-  bars: Bar[];
+export type BarsProps<XScale extends AxisScale, YScale extends AxisScale, Datum extends object> = {
+  bars: Bar<Datum>[];
   xScale: XScale;
   yScale: YScale;
   horizontal?: boolean;
   /** Optional radius to apply to bar corners. */
-  radius?: number;
+  radius?: number | BarsRadiusSizeFunc<Datum>;
   /** Whether to apply radius to all corners. */
-  radiusAll?: boolean;
+  radiusAll?: boolean | BarsApplyRadiusFunc<Datum>;
   /** Whether to apply radius to top corners. */
-  radiusTop?: boolean;
+  radiusTop?: boolean | BarsApplyRadiusFunc<Datum>;
   /** Whether to apply radius to right corners. */
-  radiusRight?: boolean;
+  radiusRight?: boolean | BarsApplyRadiusFunc<Datum>;
   /** Whether to apply radius to bottom corners. */
-  radiusBottom?: boolean;
+  radiusBottom?: boolean | BarsApplyRadiusFunc<Datum>;
   /** Whether to apply radius to left corners. */
-  radiusLeft?: boolean;
+  radiusLeft?: boolean | BarsApplyRadiusFunc<Datum>;
 } & Omit<
   SVGProps<SVGRectElement | SVGPathElement>,
-  'x' | 'y' | 'width' | 'height' | 'ref' | 'children'
+  'x' | 'y' | 'width' | 'height' | 'ref' | 'children' | 'radius'
 >;
 
 // BarStack transforms its child series Datum into CombinedData<XScale, YScale>