diff --git a/.changeset/cold-beers-knock.md b/.changeset/cold-beers-knock.md
new file mode 100644
index 00000000000..83b65e4cce3
--- /dev/null
+++ b/.changeset/cold-beers-knock.md
@@ -0,0 +1,5 @@
+---
+"hardhat": patch
+---
+
+Display contract runtime bytecode size in the gas stats table and JSON output
diff --git a/packages/hardhat/src/internal/builtin-plugins/gas-analytics/gas-analytics-manager.ts b/packages/hardhat/src/internal/builtin-plugins/gas-analytics/gas-analytics-manager.ts
index b6c84bf0189..46652b12725 100644
--- a/packages/hardhat/src/internal/builtin-plugins/gas-analytics/gas-analytics-manager.ts
+++ b/packages/hardhat/src/internal/builtin-plugins/gas-analytics/gas-analytics-manager.ts
@@ -1,5 +1,6 @@
 import type {
   ContractGasStatsJson,
+  DeploymentGasStatsJsonEntry,
   GasAnalyticsManager,
   GasMeasurement,
   GasStatsJson,
@@ -10,7 +11,10 @@ import type { TableItem } from "@nomicfoundation/hardhat-utils/format";
 import crypto from "node:crypto";
 import path from "node:path";
 
-import { HardhatError } from "@nomicfoundation/hardhat-errors";
+import {
+  HardhatError,
+  assertHardhatInvariant,
+} from "@nomicfoundation/hardhat-errors";
 import { formatTable } from "@nomicfoundation/hardhat-utils/format";
 import {
   ensureDir,
@@ -31,8 +35,12 @@ const gasStatsLog = debug(
   "hardhat:core:gas-analytics:gas-analytics-manager:gas-stats",
 );
 
+interface DeploymentGasStats extends GasStats {
+  runtimeSize: number;
+}
+
 interface ContractGasStats {
-  deployment?: GasStats;
+  deployment?: DeploymentGasStats;
   functions: Map<
     string, // function name or signature (if overloaded)
     GasStats
@@ -53,6 +61,7 @@ type GasMeasurementsByContract = Map<string, ContractGasMeasurements>;
 
 interface ContractGasMeasurements {
   deployments: number[];
+  deploymentRuntimeSize?: number;
   functions: Map<
     string, // functionSig
     number[]
@@ -176,12 +185,18 @@ export class GasAnalyticsManagerImplementation implements GasAnalyticsManager {
       };
 
       if (measurements.deployments.length > 0) {
+        assertHardhatInvariant(
+          measurements.deploymentRuntimeSize !== undefined,
+          "deploymentRuntimeSize must be set when deployments exist",
+        );
+
         contractGasStats.deployment = {
           min: Math.min(...measurements.deployments),
           max: Math.max(...measurements.deployments),
           avg: Math.round(avg(measurements.deployments)),
           median: Math.round(median(measurements.deployments)),
           count: measurements.deployments.length,
+          runtimeSize: measurements.deploymentRuntimeSize,
         };
       }
 
@@ -236,6 +251,10 @@ export class GasAnalyticsManagerImplementation implements GasAnalyticsManager {
 
       if (currentMeasurement.type === "deployment") {
         contractMeasurements.deployments.push(currentMeasurement.gas);
+        if (contractMeasurements.deploymentRuntimeSize === undefined) {
+          contractMeasurements.deploymentRuntimeSize =
+            currentMeasurement.runtimeSize;
+        }
       } else {
         let measurements = contractMeasurements.functions.get(
           currentMeasurement.functionSig,
@@ -337,6 +356,13 @@ export class GasAnalyticsManagerImplementation implements GasAnalyticsManager {
             `${contractGasStats.deployment.count}`,
           ],
         });
+        rows.push({
+          type: "header",
+          cells: [
+            chalk.yellow("Bytecode size"),
+            `${contractGasStats.deployment.runtimeSize}`,
+          ],
+        });
       }
     }
 
@@ -361,7 +387,7 @@ export class GasAnalyticsManagerImplementation implements GasAnalyticsManager {
     for (const { userFqn, stats } of sortedContracts) {
       const { sourceName, contractName } = parseFullyQualifiedName(userFqn);
 
-      const deployment: GasStatsJsonEntry | null =
+      const deployment: DeploymentGasStatsJsonEntry | null =
         stats.deployment !== undefined ? { ...stats.deployment } : null;
 
       let functions: Record<string, GasStatsJsonEntry> | null = null;
diff --git a/packages/hardhat/src/internal/builtin-plugins/gas-analytics/types.ts b/packages/hardhat/src/internal/builtin-plugins/gas-analytics/types.ts
index 01298f2e966..003f7f5a455 100644
--- a/packages/hardhat/src/internal/builtin-plugins/gas-analytics/types.ts
+++ b/packages/hardhat/src/internal/builtin-plugins/gas-analytics/types.ts
@@ -9,6 +9,13 @@ export interface GasStatsJsonEntry {
   count: number;
 }
 
+/**
+ * Gas statistics for a deployment, including bytecode size.
+ */
+export interface DeploymentGasStatsJsonEntry extends GasStatsJsonEntry {
+  runtimeSize: number;
+}
+
 /**
  * Gas statistics for a single contract in the JSON output.
  * `deployment` is null when the contract was never deployed during the test run
@@ -18,7 +25,7 @@ export interface GasStatsJsonEntry {
 export interface ContractGasStatsJson {
   sourceName: string;
   contractName: string;
-  deployment: GasStatsJsonEntry | null;
+  deployment: DeploymentGasStatsJsonEntry | null;
   functions: Record<string, GasStatsJsonEntry> | null;
 }
 
@@ -43,7 +50,7 @@ interface FunctionGasMeasurement extends BaseGasMeasurement {
 
 interface DeploymentGasMeasurement extends BaseGasMeasurement {
   type: "deployment";
-  size: number;
+  runtimeSize: number;
 }
 
 export type GasMeasurement = FunctionGasMeasurement | DeploymentGasMeasurement;
diff --git a/packages/hardhat/src/internal/builtin-plugins/network-manager/edr/utils/convert-to-edr.ts b/packages/hardhat/src/internal/builtin-plugins/network-manager/edr/utils/convert-to-edr.ts
index 7c17dfe7186..cafa173220d 100644
--- a/packages/hardhat/src/internal/builtin-plugins/network-manager/edr/utils/convert-to-edr.ts
+++ b/packages/hardhat/src/internal/builtin-plugins/network-manager/edr/utils/convert-to-edr.ts
@@ -404,7 +404,7 @@ export function edrGasReportToHardhatGasMeasurements(
           contractFqn,
           type: "deployment",
           gas: Number(deployment.gas),
-          size: Number(deployment.size),
+          runtimeSize: Number(deployment.runtimeSize),
         });
       }
     }
diff --git a/packages/hardhat/test/internal/builtin-plugins/gas-analytics/gas-analytics-manager.ts b/packages/hardhat/test/internal/builtin-plugins/gas-analytics/gas-analytics-manager.ts
index f27d635dd6a..5a4010bda6c 100644
--- a/packages/hardhat/test/internal/builtin-plugins/gas-analytics/gas-analytics-manager.ts
+++ b/packages/hardhat/test/internal/builtin-plugins/gas-analytics/gas-analytics-manager.ts
@@ -67,7 +67,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         };
 
         manager.addGasMeasurement(deploymentMeasurement);
@@ -90,7 +90,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         };
 
         manager.addGasMeasurement(measurement1);
@@ -115,7 +115,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         };
 
         manager.addGasMeasurement(measurement1);
@@ -154,7 +154,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         };
 
         manager.addGasMeasurement(measurement1);
@@ -179,7 +179,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         };
 
         manager.addGasMeasurement(measurement1);
@@ -217,7 +217,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         };
         manager.addGasMeasurement(measurement1);
         manager.addGasMeasurement(measurement2);
@@ -274,7 +274,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         };
         manager.addGasMeasurement(measurement1);
         manager.addGasMeasurement(measurement2);
@@ -430,7 +430,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         });
 
         const result = manager._aggregateGasMeasurements();
@@ -444,6 +444,7 @@ describe("gas-analytics-manager", () => {
           "Contract measurements should be defined",
         );
         assert.deepEqual(contractMeasurements.deployments, [500000]);
+        assert.equal(contractMeasurements.deploymentRuntimeSize, 2048);
         assert.equal(contractMeasurements.functions.size, 0);
       });
 
@@ -453,7 +454,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         });
         manager.addGasMeasurement({
           type: "function",
@@ -480,6 +481,7 @@ describe("gas-analytics-manager", () => {
         );
 
         assert.deepEqual(contractMeasurements.deployments, [500000]);
+        assert.equal(contractMeasurements.deploymentRuntimeSize, 2048);
 
         assert.equal(contractMeasurements.functions.size, 2);
         const transferMeasurements = contractMeasurements.functions.get(
@@ -512,7 +514,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/TokenB.sol:TokenB",
           gas: 600000,
-          size: 3072,
+          runtimeSize: 3072,
         });
         manager.addGasMeasurement({
           type: "function",
@@ -550,6 +552,7 @@ describe("gas-analytics-manager", () => {
           "TokenB measurements should be defined",
         );
         assert.deepEqual(tokenBMeasurements.deployments, [600000]);
+        assert.equal(tokenBMeasurements.deploymentRuntimeSize, 3072);
         assert.equal(tokenBMeasurements.functions.size, 1);
         const burnMeasurements =
           tokenBMeasurements.functions.get("burn(uint256)");
@@ -655,13 +658,13 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         });
         manager.addGasMeasurement({
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 600000,
-          size: 3072,
+          runtimeSize: 3072,
         });
 
         const result = manager._aggregateGasMeasurements();
@@ -675,6 +678,7 @@ describe("gas-analytics-manager", () => {
           "Contract measurements should be defined",
         );
         assert.deepEqual(contractMeasurements.deployments, [500000, 600000]);
+        assert.equal(contractMeasurements.deploymentRuntimeSize, 2048);
       });
     });
 
@@ -730,19 +734,19 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 400000,
-          size: 2048,
+          runtimeSize: 2048,
         });
         manager.addGasMeasurement({
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         });
         manager.addGasMeasurement({
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 600000,
-          size: 3072,
+          runtimeSize: 3072,
         });
 
         const gasStats = manager._calculateGasStats();
@@ -764,6 +768,7 @@ describe("gas-analytics-manager", () => {
         assert.equal(contractStats.deployment.avg, 500000);
         assert.equal(contractStats.deployment.median, 500000);
         assert.equal(contractStats.deployment.count, 3);
+        assert.equal(contractStats.deployment.runtimeSize, 2048);
       });
 
       it("should calculate stats for multiple contracts", () => {
@@ -954,6 +959,7 @@ describe("gas-analytics-manager", () => {
             avg: 500000,
             median: 500000,
             count: 3,
+            runtimeSize: 2048,
           },
           functions: new Map([
             // Functions are added in non-alphabetical order to test sorting
@@ -998,7 +1004,9 @@ describe("gas-analytics-manager", () => {
 ║ ${chalk.yellow("Deployment")}                      │ ${chalk.yellow("Min")}    │ ${chalk.yellow("Average")} │ ${chalk.yellow("Median")} │ ${chalk.yellow("Max")}    │ ${chalk.yellow("#deployments")} ║
 ╟─────────────────────────────────┼────────┼─────────┼────────┼────────┼──────────────╢
 ║                                 │ 400000 │ 500000  │ 500000 │ 600000 │ 3            ║
-╚═════════════════════════════════╧════════╧═════════╧════════╧════════╧══════════════╝
+╟─────────────────────────────────┼────────┼─────────┴────────┴────────┴──────────────╢
+║ ${chalk.yellow("Bytecode size")}                   │ 2048   │                                          ║
+╚═════════════════════════════════╧════════╧══════════════════════════════════════════╝
 ╔═════════════════════════════════════════════════════════════════════════════════════╗
 ║ ${chalk.cyan.bold("contracts/TokenA.sol:TokenA")}                                                         ║
 ╟─────────────────────────────────┬────────┬─────────┬────────┬────────┬──────────────╢
@@ -1116,7 +1124,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         });
         manager.addGasMeasurement({
           type: "function",
@@ -1138,6 +1146,7 @@ describe("gas-analytics-manager", () => {
           avg: 500000,
           median: 500000,
           count: 1,
+          runtimeSize: 2048,
         });
         assert.ok(contract.functions !== null, "functions should not be null");
         assert.deepEqual(contract.functions.transfer, {
@@ -1172,7 +1181,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/Factory.sol:Factory",
           gas: 300000,
-          size: 1024,
+          runtimeSize: 1024,
         });
         const stats = manager._calculateGasStats();
         const result = manager._generateGasStatsJson(stats);
@@ -1192,13 +1201,13 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/ZContract.sol:ZContract",
           gas: 100000,
-          size: 512,
+          runtimeSize: 512,
         });
         manager.addGasMeasurement({
           type: "deployment",
           contractFqn: "project/contracts/AContract.sol:AContract",
           gas: 200000,
-          size: 512,
+          runtimeSize: 512,
         });
         const stats = manager._calculateGasStats();
         const result = manager._generateGasStatsJson(stats);
@@ -1276,7 +1285,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 100000,
-          size: 512,
+          runtimeSize: 512,
         });
         const stats = manager._calculateGasStats();
         const result = manager._generateGasStatsJson(stats);
@@ -1324,7 +1333,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: internalFqn,
           gas: 250000,
-          size: 1024,
+          runtimeSize: 1024,
         });
         const stats = manager._calculateGasStats();
         const result = manager._generateGasStatsJson(stats);
@@ -1398,7 +1407,7 @@ describe("gas-analytics-manager", () => {
           type: "deployment",
           contractFqn: "project/contracts/MyContract.sol:MyContract",
           gas: 500000,
-          size: 2048,
+          runtimeSize: 2048,
         });
         await manager.saveGasMeasurements("test-id");