diff --git a/packages/delegation-deployments/CHANGELOG.md b/packages/delegation-deployments/CHANGELOG.md
index 0fca189d..023227e7 100644
--- a/packages/delegation-deployments/CHANGELOG.md
+++ b/packages/delegation-deployments/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Add chain deployment for Robinhood Chain mainnet and testnet ([#277](https://github.com/MetaMask/smart-accounts-kit/pull/277))
+- Add chain deployment for Arc Testnet ([#289](https://github.com/MetaMask/smart-accounts-kit/pull/289))
 
 ### Changed
 
diff --git a/packages/delegation-deployments/script/validate-contract-deployments.ts b/packages/delegation-deployments/script/validate-contract-deployments.ts
index 19be281e..2690ca0b 100644
--- a/packages/delegation-deployments/script/validate-contract-deployments.ts
+++ b/packages/delegation-deployments/script/validate-contract-deployments.ts
@@ -389,8 +389,25 @@ const celoSepoliaChain: Chain = {
   },
 };
 
+const arcTestnetChain: Chain = {
+  id: 5042002,
+  name: 'Arc Testnet',
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.testnet.arc.network'],
+    },
+  },
+  // Arc uses USDC as its native gas token instead of a volatile native currency.
+  nativeCurrency: {
+    name: 'USDC',
+    symbol: 'USDC',
+    decimals: 18,
+  },
+};
+
 export const chains = {
   ...allChains,
+  arcTestnet: arcTestnetChain,
   megaEthTestNet: megaEthTestNetChain,
   berachainMainnet: berachainMainnetChain,
   bepoliaTestnet: bepoliaTestnetChain,
diff --git a/packages/delegation-deployments/src/index.ts b/packages/delegation-deployments/src/index.ts
index b6e17ff4..a9af45e6 100644
--- a/packages/delegation-deployments/src/index.ts
+++ b/packages/delegation-deployments/src/index.ts
@@ -57,6 +57,7 @@ export const CHAIN_ID = {
   katanaBokuto: 0xb405d,
   intuitionTestnet: 0x350b,
   robinhoodTestnet: 0xb626,
+  arcTestnet: 0x4cef52,
   // decommissioned
   lineaGoerli: 0xe704,
 };
@@ -150,5 +151,7 @@ export const DELEGATOR_CONTRACTS: DeployedContracts = {
     [CHAIN_ID.katanaBokuto]: DEPLOYMENTS_1_3_0,
     [CHAIN_ID.intuitionTestnet]: DEPLOYMENTS_1_3_0,
     [CHAIN_ID.robinhoodTestnet]: DEPLOYMENTS_1_3_0,
+    // Deployment pending: not yet deployed on Arc as of writing.
+    [CHAIN_ID.arcTestnet]: DEPLOYMENTS_1_3_0,
   },
 };