diff --git a/.changeset/late-walls-compete.md b/.changeset/late-walls-compete.md
new file mode 100644
index 0000000000..da93f39f86
--- /dev/null
+++ b/.changeset/late-walls-compete.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Ubiq Mainnet.
diff --git a/src/chains/definitions/ubiq.ts b/src/chains/definitions/ubiq.ts
new file mode 100644
index 0000000000..d2c96ec052
--- /dev/null
+++ b/src/chains/definitions/ubiq.ts
@@ -0,0 +1,19 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const ubiq = /*#__PURE__*/ defineChain({
+  id: 8,
+  name: 'Ubiq Mainnet',
+  nativeCurrency: { name: 'UBQ', symbol: 'UBQ', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: ['https://pyrus2.ubiqscan.io'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Ubiq Scan',
+      url: 'https://ubiqscan.io',
+    },
+  },
+  testnet: false,
+})
diff --git a/src/chains/index.ts b/src/chains/index.ts
index 58be9dcbe9..c66aab940d 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -365,6 +365,7 @@ export { thunderCore } from './definitions/thunderCore.js'
 export { thunderTestnet } from './definitions/thunderTestnet.js'
 export { tiktrixTestnet } from './definitions/tiktrixTestnet.js'
 export { tron } from './definitions/tron.js'
+export { ubiq } from './definitions/ubiq.js'
 export { ultron } from './definitions/ultron.js'
 export { ultronTestnet } from './definitions/ultronTestnet.js'
 export { unichainSepolia } from './definitions/unichainSepolia.js'