diff --git a/packages/thirdweb/src/chains/chain-definitions/monad-testnet.ts b/packages/thirdweb/src/chains/chain-definitions/monad-testnet.ts
new file mode 100644
index 00000000000..3604edd55b1
--- /dev/null
+++ b/packages/thirdweb/src/chains/chain-definitions/monad-testnet.ts
@@ -0,0 +1,17 @@
+import { defineChain } from "../utils.js";
+
+/**
+ * @chain
+ */
+export const monadTestnet = /*@__PURE__*/ defineChain({
+  id: 10143,
+  name: "Monad Testnet",
+  nativeCurrency: { name: "Mon", symbol: "MON", decimals: 18 },
+  blockExplorers: [
+    {
+      name: "Monad Explorer",
+      url: "https://testnet.monadexplorer.com/",
+    },
+  ],
+  testnet: true,
+});
\ No newline at end of file
diff --git a/packages/thirdweb/src/exports/chains.ts b/packages/thirdweb/src/exports/chains.ts
index 6126c1a4c72..f1ea4357358 100644
--- a/packages/thirdweb/src/exports/chains.ts
+++ b/packages/thirdweb/src/exports/chains.ts
@@ -82,3 +82,4 @@ export { mode } from "../chains/chain-definitions/mode.js";
 export { soneiumMinato } from "../chains/chain-definitions/soneium-minato.js";
 export { treasure } from "../chains/chain-definitions/treasure.js";
 export { treasureTopaz } from "../chains/chain-definitions/treasureTopaz.js";
+export { monadTestnet } from "../chains/chain-definitions/monad-testnet.js";