diff --git a/.changeset/chatty-spies-fail.md b/.changeset/chatty-spies-fail.md
new file mode 100644
index 0000000000..833d325122
--- /dev/null
+++ b/.changeset/chatty-spies-fail.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added World Chain
diff --git a/src/chains/definitions/worldchain.ts b/src/chains/definitions/worldchain.ts
new file mode 100644
index 0000000000..2d6a8c16bf
--- /dev/null
+++ b/src/chains/definitions/worldchain.ts
@@ -0,0 +1,18 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const worldchain = /*#__PURE__*/ defineChain({
+  id: 480,
+  name: 'World Chain',
+  network: 'worldchain',
+  nativeCurrency: { name: 'Ether', symbol: 'ETH', decimals: 18 },
+  rpcUrls: {
+    default: { http: ['https://worldchain-mainnet.g.alchemy.com/public'] },
+  },
+  blockExplorers: {
+    default: {
+      name: 'World Chain Explorer',
+      url: 'https://worldchain-mainnet.explorer.alchemy.com',
+    },
+  },
+  testnet: false,
+})
diff --git a/src/chains/definitions/worldchainSepolia.ts b/src/chains/definitions/worldchainSepolia.ts
new file mode 100644
index 0000000000..6ea2818448
--- /dev/null
+++ b/src/chains/definitions/worldchainSepolia.ts
@@ -0,0 +1,19 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const worldchainSepolia = /*#__PURE__*/ defineChain({
+  id: 4801,
+  name: 'World Chain Sepolia',
+  network: 'worldchain-sepolia',
+  nativeCurrency: { name: 'Ether', symbol: 'ETH', decimals: 18 },
+  rpcUrls: {
+    default: { http: ['https://worldchain-sepolia.g.alchemy.com/public'] },
+    public: { http: ['https://worldchain-sepolia.g.alchemy.com/public'] },
+  },
+  blockExplorers: {
+    default: {
+      name: 'World Chain Sepolia Explorer',
+      url: 'https://worldchain-sepolia.explorer.alchemy.com',
+    },
+  },
+  testnet: true,
+})
diff --git a/src/chains/index.ts b/src/chains/index.ts
index 53a8065091..80d35583a4 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -314,6 +314,8 @@ export { wanchain } from './definitions/wanchain.js'
 export { wanchainTestnet } from './definitions/wanchainTestnet.js'
 export { wemix } from './definitions/wemix.js'
 export { wemixTestnet } from './definitions/wemixTestnet.js'
+export { worldchain } from './definitions/worldchain.js'
+export { worldchainSepolia } from './definitions/worldchainSepolia.js'
 export {
   xLayerTestnet,
   /** @deprecated Use `xLayerTestnet` */