diff --git a/.changeset/hungry-humans-design.md b/.changeset/hungry-humans-design.md
new file mode 100644
index 0000000000..9f548ba00c
--- /dev/null
+++ b/.changeset/hungry-humans-design.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Silicon chains.
diff --git a/src/chains/definitions/silicon.ts b/src/chains/definitions/silicon.ts
new file mode 100644
index 0000000000..65765b034b
--- /dev/null
+++ b/src/chains/definitions/silicon.ts
@@ -0,0 +1,18 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const silicon = /*#__PURE__*/ defineChain({
+  id: 2355,
+  name: 'Silicon zkEVM',
+  nativeCurrency: { name: 'Ether', symbol: 'ETH', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.silicon.network', 'https://silicon-mainnet.nodeinfra.com'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'SiliconScope',
+      url: 'https://scope.silicon.network',
+    },
+  },
+})
diff --git a/src/chains/definitions/siliconSepolia.ts b/src/chains/definitions/siliconSepolia.ts
new file mode 100644
index 0000000000..71a5ae30a2
--- /dev/null
+++ b/src/chains/definitions/siliconSepolia.ts
@@ -0,0 +1,19 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const siliconSepolia = /*#__PURE__*/ defineChain({
+  id: 1722641160,
+  name: 'Silicon Sepolia zkEVM',
+  nativeCurrency: { name: 'Ether', symbol: 'ETH', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc-sepolia.silicon.network', 'https://silicon-testnet.nodeinfra.com'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'SiliconSepoliaScope',
+      url: 'https://scope-sepolia.silicon.network',
+    },
+  },
+  testnet: true,
+})
diff --git a/src/chains/index.ts b/src/chains/index.ts
index d2bb1be43d..be80a866d6 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -292,6 +292,8 @@ export { shardeumSphinx } from './definitions/shardeumSphinx.js'
 export { shibarium } from './definitions/shibarium.js'
 export { shibariumTestnet } from './definitions/shibariumTestnet.js'
 export { storyTestnet } from './definitions/storyTestnet.js'
+export { silicon } from './definitions/silicon.js'
+export { siliconSepolia } from './definitions/siliconSepolia.js'
 export { stratis } from './definitions/stratis.js'
 export { syscoin } from './definitions/syscoin.js'
 export { syscoinTestnet } from './definitions/syscoinTestnet.js'