diff --git a/.changeset/giant-pandas-laugh.md b/.changeset/giant-pandas-laugh.md
new file mode 100644
index 00000000..e4bca1c6
--- /dev/null
+++ b/.changeset/giant-pandas-laugh.md
@@ -0,0 +1,5 @@
+---
+"@wagmi/chains": patch
+---
+
+Added Emerald, Sapphire & Sapphire Testnet chains.
diff --git a/packages/chains/src/emerald.ts b/packages/chains/src/emerald.ts
new file mode 100644
index 00000000..0573f39e
--- /dev/null
+++ b/packages/chains/src/emerald.ts
@@ -0,0 +1,34 @@
+import { Chain } from './types'
+
+export const emerald = {
+  id: 42262,
+  name: 'Oasis Emerald',
+  network: 'emerald',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'Oasis ROSE',
+    symbol: 'ROSE',
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://emerald.oasis.dev'],
+      webSocket: ['wss://emerald.oasis.dev/ws'],
+    },
+    public: {
+      http: ['https://emerald.oasis.dev'],
+      webSocket: ['wss://emerald.oasis.dev/ws'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Oasis Explorer',
+      url: 'https://explorer.emerald.oasis.dev',
+    },
+  },
+  contracts: {
+    multicall3: {
+      address: '0xcA11bde05977b3631167028862bE2a173976CA11',
+      blockCreated: 1481392,
+    },
+  },
+} as const satisfies Chain
diff --git a/packages/chains/src/index.ts b/packages/chains/src/index.ts
index 840c25dd..297e07ff 100644
--- a/packages/chains/src/index.ts
+++ b/packages/chains/src/index.ts
@@ -31,6 +31,7 @@ export { dfk } from './dfk'
 export { dogechain } from './dogechain'
 export { edgeware } from './edgeware'
 export { edgewareTestnet } from './edgewareTestnet'
+export { emerald } from './emerald'
 export { eos } from './eos'
 export { eosTestnet } from './eosTestnet'
 export { evmos } from './evmos'
@@ -95,6 +96,8 @@ export { ronin } from './ronin'
 export { saigon } from './saigon'
 export { scrollSepolia } from './scrollSepolia'
 export { scrollTestnet } from './scrollTestnet'
+export { sapphire } from './sapphire'
+export { sapphireTestnet } from './sapphireTestnet'
 export { sepolia } from './sepolia'
 export { skaleBlockBrawlers } from './skale/brawl'
 export { skaleCalypso } from './skale/calypso'
diff --git a/packages/chains/src/sapphire.ts b/packages/chains/src/sapphire.ts
new file mode 100644
index 00000000..19af3824
--- /dev/null
+++ b/packages/chains/src/sapphire.ts
@@ -0,0 +1,34 @@
+import { Chain } from './types'
+
+export const sapphire = {
+  id: 23294,
+  name: 'Oasis Sapphire',
+  network: 'sapphire',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'Oasis ROSE',
+    symbol: 'ROSE',
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://sapphire.oasis.io'],
+      webSocket: ['wss://sapphire.oasis.io/ws'],
+    },
+    public: {
+      http: ['https://sapphire.oasis.io'],
+      webSocket: ['wss://sapphire.oasis.io/ws'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Oasis Explorer',
+      url: 'https://explorer.oasis.io/mainnet/sapphire',
+    },
+  },
+  contracts: {
+    multicall3: {
+      address: '0xcA11bde05977b3631167028862bE2a173976CA11',
+      blockCreated: 734531,
+    },
+  },
+} as const satisfies Chain
diff --git a/packages/chains/src/sapphireTestnet.ts b/packages/chains/src/sapphireTestnet.ts
new file mode 100644
index 00000000..0ab5f50f
--- /dev/null
+++ b/packages/chains/src/sapphireTestnet.ts
@@ -0,0 +1,28 @@
+import { Chain } from './types'
+
+export const sapphireTestnet = {
+  id: 23295,
+  name: 'Oasis Sapphire Testnet',
+  network: 'sapphireTestnet',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'Oasis TEST',
+    symbol: 'TEST',
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://testnet.sapphire.oasis.dev'],
+      webSocket: ['wss://testnet.sapphire.oasis.dev/ws'],
+    },
+    public: {
+      http: ['https://testnet.sapphire.oasis.dev'],
+      webSocket: ['wss://testnet.sapphire.oasis.dev/ws'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Oasis Explorer',
+      url: 'https://explorer.oasis.io/testnet/sapphire',
+    },
+  },
+} as const satisfies Chain