diff --git a/.changeset/flat-penguins-sort.md b/.changeset/flat-penguins-sort.md
new file mode 100644
index 0000000000..1b1594bf49
--- /dev/null
+++ b/.changeset/flat-penguins-sort.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Neo X Mainnet.
diff --git a/src/chains/definitions/neoxMainnet.ts b/src/chains/definitions/neoxMainnet.ts
new file mode 100644
index 0000000000..e8f7865e85
--- /dev/null
+++ b/src/chains/definitions/neoxMainnet.ts
@@ -0,0 +1,22 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const neoxMainnet = /*#__PURE__*/ defineChain({
+  id: 47763,
+  name: 'Neo X Mainnet',
+  nativeCurrency: { name: 'Gas', symbol: 'GAS', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: [
+        'https://mainnet-1.rpc.banelabs.org',
+        'https://mainnet-2.rpc.banelabs.org',
+      ],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Neo X - Explorer',
+      url: 'https://xexplorer.neo.org',
+    },
+  },
+  testnet: false,
+})
diff --git a/src/chains/index.ts b/src/chains/index.ts
index 7dc30cc260..4ff241fed2 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -290,6 +290,7 @@ export { nahmii } from './definitions/nahmii.js'
 export { nautilus } from './definitions/nautilus.js'
 export { neonDevnet } from './definitions/neonDevnet.js'
 export { neonMainnet } from './definitions/neonMainnet.js'
+export { neoxMainnet } from './definitions/neoxMainnet.js'
 export { nexi } from './definitions/nexi.js'
 export { nexilix } from './definitions/nexilix.js'
 export { oasisTestnet } from './definitions/oasisTestnet.js'