diff --git a/.changeset/data-visualization-block.md b/.changeset/data-visualization-block.md
new file mode 100644
index 000000000..9a077c663
--- /dev/null
+++ b/.changeset/data-visualization-block.md
@@ -0,0 +1,5 @@
+---
+"@slack/types": minor
+---
+
+feat: add `DataVisualizationBlock` type for the [`data_visualization`](https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block) Block Kit block
diff --git a/packages/types/src/block-kit/blocks.ts b/packages/types/src/block-kit/blocks.ts
index 20cd9561c..5ae0d6882 100644
--- a/packages/types/src/block-kit/blocks.ts
+++ b/packages/types/src/block-kit/blocks.ts
@@ -63,6 +63,7 @@ export type KnownBlock =
   | ContextBlock
   | ContextActionsBlock
   | DataTableBlock
+  | DataVisualizationBlock
   | DividerBlock
   | FileBlock
   | HeaderBlock
@@ -291,6 +292,172 @@ export interface ContextActionsBlock extends Block {
   elements: ContextActionsBlockElement[];
 }
 
+/**
+ * @description A single slice of a {@link DataVisualizationPieChart}.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+interface DataVisualizationPieSegment {
+  /**
+   * @description Display name for this slice, shown in the legend and on hover. Maximum of 20 characters.
+   */
+  label: string;
+  /**
+   * @description Numeric weight of this slice. Must be greater than 0. Rendered percentage is the value divided by
+   * the sum of all segment values.
+   */
+  value: number;
+}
+
+/**
+ * @description A single data point within a {@link DataVisualizationSeries}.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+interface DataVisualizationDataPoint {
+  /**
+   * @description The x-axis category this point belongs to. Must match one of the values in `axis_config.categories`.
+   * Maximum of 20 characters.
+   */
+  label: string;
+  /**
+   * @description Numeric y-axis value. Negative values are permitted.
+   */
+  value: number;
+}
+
+/**
+ * @description A series of data points displayed in a bar, area, or line {@link DataVisualizationBlock} chart.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+interface DataVisualizationSeries {
+  /**
+   * @description Human-readable identifier displayed in the chart legend. Must be unique across all series in the
+   * same chart. Maximum 20 characters.
+   */
+  name: string;
+  /**
+   * @description Ordered data points. Min 1, max 20. Must contain exactly one entry for every label in
+   * `axis_config.categories`.
+   */
+  data: DataVisualizationDataPoint[];
+}
+
+/**
+ * @description Axis configuration for a bar, area, or line {@link DataVisualizationBlock} chart.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+interface DataVisualizationAxisConfig {
+  /**
+   * @description Category labels for the x-axis. Defines valid labels and their left-to-right display order. Each
+   * category label has a maximum of 20 characters.
+   */
+  categories: string[];
+  /**
+   * @description Descriptive title displayed below the x-axis (e.g., "Time of Day"). Maximum of 50 characters.
+   */
+  x_label?: string;
+  /**
+   * @description Descriptive title displayed beside the y-axis (e.g., "Latency (ms)"). Maximum of 50 characters.
+   */
+  y_label?: string;
+}
+
+/**
+ * @description A pie chart for a {@link DataVisualizationBlock}.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+interface DataVisualizationPieChart {
+  /**
+   * @description The type of chart. In this case, `pie`.
+   */
+  type: 'pie';
+  /**
+   * @description Labeled slices that make up the pie. Min 1, max 12. Each is a {@link DataVisualizationPieSegment}.
+   */
+  segments: DataVisualizationPieSegment[];
+}
+
+/**
+ * @description A bar chart for a {@link DataVisualizationBlock}.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+interface DataVisualizationBarChart {
+  /**
+   * @description The type of chart. In this case, `bar`.
+   */
+  type: 'bar';
+  /**
+   * @description Series to plot as bar groups. Min 1, max 12. For multiple series, bars are grouped by label. Each is
+   * a {@link DataVisualizationSeries}.
+   */
+  series: DataVisualizationSeries[];
+  /**
+   * @description X-axis categories and axis titles. See {@link DataVisualizationAxisConfig}.
+   */
+  axis_config: DataVisualizationAxisConfig;
+}
+
+/**
+ * @description An area chart for a {@link DataVisualizationBlock}.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+interface DataVisualizationAreaChart {
+  /**
+   * @description The type of chart. In this case, `area`.
+   */
+  type: 'area';
+  /**
+   * @description Series to plot as filled areas. Min 1, max 12. Series are layered in array order (first at back).
+   * Each is a {@link DataVisualizationSeries}.
+   */
+  series: DataVisualizationSeries[];
+  /**
+   * @description X-axis categories and axis titles. See {@link DataVisualizationAxisConfig}.
+   */
+  axis_config: DataVisualizationAxisConfig;
+}
+
+/**
+ * @description A line chart for a {@link DataVisualizationBlock}.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+interface DataVisualizationLineChart {
+  /**
+   * @description The type of chart. In this case, `line`.
+   */
+  type: 'line';
+  /**
+   * @description Series to plot as lines. Min 1, max 12. Each is a {@link DataVisualizationSeries}.
+   */
+  series: DataVisualizationSeries[];
+  /**
+   * @description X-axis categories and axis titles. See {@link DataVisualizationAxisConfig}.
+   */
+  axis_config: DataVisualizationAxisConfig;
+}
+
+/**
+ * @description Displays a chart visualizing a dataset, such as a pie, bar, area, or line chart.
+ * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-visualization-block Data visualization block reference}.
+ */
+export interface DataVisualizationBlock extends Block {
+  /**
+   * @description The type of block. For a data visualization block, `type` is always `data_visualization`.
+   */
+  type: 'data_visualization';
+  /**
+   * @description A short label displayed above the chart. Maximum 50 characters.
+   */
+  title: string;
+  /**
+   * @description The chart-specific payload. Must be one of the following: `pie`, `bar`, `area`, or `line`.
+   */
+  chart:
+    | DataVisualizationPieChart
+    | DataVisualizationBarChart
+    | DataVisualizationAreaChart
+    | DataVisualizationLineChart;
+}
+
 /**
  * @description Displays rich tables that support pagination, sorting, filtering, and interactivity.
  * @see {@link https://docs.slack.dev/reference/block-kit/blocks/data-table-block Data table block reference}.
diff --git a/packages/types/test/blocks.test-d.ts b/packages/types/test/blocks.test-d.ts
index 421941b23..cf731d17b 100644
--- a/packages/types/test/blocks.test-d.ts
+++ b/packages/types/test/blocks.test-d.ts
@@ -1,5 +1,13 @@
 import { expectAssignable, expectError } from 'tsd';
-import type { AlertBlock, CardBlock, CarouselBlock, ContainerBlock, DataTableBlock, KnownBlock } from '../src/index';
+import type {
+  AlertBlock,
+  CardBlock,
+  CarouselBlock,
+  ContainerBlock,
+  DataTableBlock,
+  DataVisualizationBlock,
+  KnownBlock,
+} from '../src/index';
 
 // CardBlock
 // -- sad path
@@ -103,6 +111,84 @@ expectAssignable<KnownBlock>({
   child_blocks: [{ type: 'divider' }],
 });
 
+// DataVisualizationBlock
+// -- sad path
+expectError<DataVisualizationBlock>({}); // missing type, title and chart
+expectError<DataVisualizationBlock>({ type: 'data_visualization', title: 'Sales' }); // missing required chart
+expectError<DataVisualizationBlock>({
+  type: 'data_visualization',
+  title: 'Sales',
+  chart: { type: 'pie' }, // pie chart missing required segments
+});
+expectError<DataVisualizationBlock>({
+  type: 'data_visualization',
+  title: 'Sales',
+  chart: { type: 'bar', series: [{ name: 'Q1', data: [{ label: 'Jan', value: 1 }] }] }, // series chart missing axis_config
+});
+expectError<DataVisualizationBlock>({
+  type: 'data_visualization',
+  title: 'Sales',
+  chart: { type: 'scatter', segments: [{ label: 'A', value: 1 }] }, // unknown chart type
+});
+// -- happy path
+expectAssignable<DataVisualizationBlock>({
+  type: 'data_visualization',
+  title: 'Revenue by region',
+  chart: {
+    type: 'pie',
+    segments: [
+      { label: 'North', value: 40 },
+      { label: 'South', value: 60 },
+    ],
+  },
+});
+expectAssignable<DataVisualizationBlock>({
+  type: 'data_visualization',
+  title: 'Quarterly revenue',
+  block_id: 'viz_1',
+  chart: {
+    type: 'bar',
+    series: [
+      {
+        name: 'Product A',
+        data: [
+          { label: 'Q1', value: 10 },
+          { label: 'Q2', value: 20 },
+        ],
+      },
+      {
+        name: 'Product B',
+        data: [
+          { label: 'Q1', value: 5 },
+          { label: 'Q2', value: -3 },
+        ],
+      },
+    ],
+    axis_config: { categories: ['Q1', 'Q2'], x_label: 'Quarter', y_label: 'Revenue' },
+  },
+});
+expectAssignable<DataVisualizationBlock>({
+  type: 'data_visualization',
+  title: 'Daily active users',
+  chart: {
+    type: 'area',
+    series: [
+      { name: 'Free tier', data: [{ label: 'Mon', value: 12000 }] },
+      { name: 'Paid tier', data: [{ label: 'Mon', value: 4500 }] },
+    ],
+    axis_config: { categories: ['Mon'], x_label: 'Day', y_label: 'Users' },
+  },
+});
+expectAssignable<KnownBlock>({
+  type: 'data_visualization',
+  title: 'Trend',
+  chart: {
+    type: 'line',
+    series: [{ name: 'Users', data: [{ label: 'Mon', value: 1 }] }],
+    axis_config: { categories: ['Mon'] },
+  },
+});
+
 // DataTableBlock
 // -- sad path
 expectError<DataTableBlock>({}); // missing type, rows, and caption