diff --git a/devnet/node.yaml b/devnet/node.yaml
index 4061fa50..5a5ff28c 100644
--- a/devnet/node.yaml
+++ b/devnet/node.yaml
@@ -80,6 +80,8 @@ spec:
             - ws://eth-devnet:8545
             - --bscRPC
             - ws://eth-devnet2:8545
+            - --polygonRPC
+            - ws://eth-devnet:8545
             - --terraWS
             - ws://terra-terrad:26657/websocket
             - --terraLCD
diff --git a/event_database/cloud_functions/readrow.go b/event_database/cloud_functions/readrow.go
index 29b5fea2..9bb10cfd 100644
--- a/event_database/cloud_functions/readrow.go
+++ b/event_database/cloud_functions/readrow.go
@@ -100,6 +100,7 @@ func ReadRow(w http.ResponseWriter, r *http.Request) {
 			"ethereum": "2",
 			"terra":    "3",
 			"bsc":      "4",
+			"polygon":  "5",
 		}
 		lowercaseChain := strings.ToLower(emitterChain)
 		if _, ok := chainNameMap[lowercaseChain]; ok {
diff --git a/node/cmd/guardiand/adminnodes.go b/node/cmd/guardiand/adminnodes.go
index 22318750..716efba5 100644
--- a/node/cmd/guardiand/adminnodes.go
+++ b/node/cmd/guardiand/adminnodes.go
@@ -65,9 +65,9 @@ func runListNodes(cmd *cobra.Command, args []string) {
 	w := tabwriter.NewWriter(os.Stdout, 0, 8, 2, ' ', 0)
 
 	if showDetails {
-		_, _ = w.Write([]byte("Node key\tGuardian key\tNode name\tVersion\tLast seen\tUptime\tSolana\tEthereum\tTerra\tBSC\n"))
+		_, _ = w.Write([]byte("Node key\tGuardian key\tNode name\tVersion\tLast seen\tUptime\tSolana\tEthereum\tTerra\tBSC\nPolygon\n"))
 	} else {
-		_, _ = w.Write([]byte("Node key\tGuardian key\tNode name\tVersion\tLast seen\tSolana\tEthereum\tTerra\tBSC\n"))
+		_, _ = w.Write([]byte("Node key\tGuardian key\tNode name\tVersion\tLast seen\tSolana\tEthereum\tTerra\tBSC\nPolygon\n"))
 	}
 
 	for _, h := range nodes {
@@ -93,7 +93,7 @@ func runListNodes(cmd *cobra.Command, args []string) {
 
 		if showDetails {
 			fmt.Fprintf(w,
-				"%s\t%s\t%s\t%s\t%s\t%s\t%s %d (%d)\t%s %d (%d)\t%s %d (%d)\t%s %d (%d)\n",
+				"%s\t%s\t%s\t%s\t%s\t%s\t%s %d (%d)\t%s %d (%d)\t%s %d (%d)\t%s %d (%d)\t%s %d (%d)\n",
 				h.P2PNodeAddr,
 				h.RawHeartbeat.GuardianAddr,
 				h.RawHeartbeat.NodeName,
@@ -112,10 +112,13 @@ func runListNodes(cmd *cobra.Command, args []string) {
 				truncAddrs[vaa.ChainIDBSC],
 				heights[vaa.ChainIDBSC],
 				errors[vaa.ChainIDBSC],
+				truncAddrs[vaa.ChainIDPolygon],
+				heights[vaa.ChainIDPolygon],
+				errors[vaa.ChainIDPolygon],
 			)
 		} else {
 			fmt.Fprintf(w,
-				"%s\t%s\t%s\t%s\t%s\t%d\t%d\t%d\t%d\n",
+				"%s\t%s\t%s\t%s\t%s\t%d\t%d\t%d\t%d\t%d\n",
 				h.P2PNodeAddr,
 				h.RawHeartbeat.GuardianAddr,
 				h.RawHeartbeat.NodeName,
@@ -125,6 +128,7 @@ func runListNodes(cmd *cobra.Command, args []string) {
 				heights[vaa.ChainIDEthereum],
 				heights[vaa.ChainIDTerra],
 				heights[vaa.ChainIDBSC],
+				heights[vaa.ChainIDPolygon],
 			)
 		}
 	}
diff --git a/node/cmd/guardiand/node.go b/node/cmd/guardiand/node.go
index b866fae6..883ed778 100644
--- a/node/cmd/guardiand/node.go
+++ b/node/cmd/guardiand/node.go
@@ -66,6 +66,9 @@ var (
 	bscRPC      *string
 	bscContract *string
 
+	polygonRPC      *string
+	polygonContract *string
+
 	terraWS       *string
 	terraLCD      *string
 	terraContract *string
@@ -119,6 +122,9 @@ func init() {
 	bscRPC = NodeCmd.Flags().String("bscRPC", "", "Binance Smart Chain RPC URL")
 	bscContract = NodeCmd.Flags().String("bscContract", "", "Binance Smart Chain contract address")
 
+	polygonRPC = NodeCmd.Flags().String("polygonRPC", "", "Polygon RPC URL")
+	polygonContract = NodeCmd.Flags().String("polygonContract", "", "Polygon contract address")
+
 	terraWS = NodeCmd.Flags().String("terraWS", "", "Path to terrad root for websocket connection")
 	terraLCD = NodeCmd.Flags().String("terraLCD", "", "Path to LCD service root for http calls")
 	terraContract = NodeCmd.Flags().String("terraContract", "", "Wormhole contract address on Terra blockchain")
@@ -280,6 +286,7 @@ func runNode(cmd *cobra.Command, args []string) {
 		// Deterministic ganache ETH devnet address.
 		*ethContract = devnet.GanacheWormholeContractAddress.Hex()
 		*bscContract = devnet.GanacheWormholeContractAddress.Hex()
+		*polygonContract = devnet.GanacheWormholeContractAddress.Hex()
 
 		// Use the hostname as nodeName. For production, we don't want to do this to
 		// prevent accidentally leaking sensitive hostnames.
@@ -316,6 +323,12 @@ func runNode(cmd *cobra.Command, args []string) {
 	if *bscContract == "" {
 		logger.Fatal("Please specify --bscContract")
 	}
+	if *polygonRPC == "" {
+		logger.Fatal("Please specify --polygonRPC")
+	}
+	if *polygonContract == "" {
+		logger.Fatal("Please specify --polygonContract")
+	}
 	if *nodeName == "" {
 		logger.Fatal("Please specify --nodeName")
 	}
@@ -373,12 +386,14 @@ func runNode(cmd *cobra.Command, args []string) {
 	//
 	// Insert "I'm a sign, not a cop" meme.
 	//
-	if strings.HasSuffix(*ethRPC, "mainnet.infura.io") {
+	if strings.HasSuffix(*ethRPC, "mainnet.infura.io") ||
+		strings.HasSuffix(*polygonRPC, "polygon-mainnet.infura.io") {
 		logger.Fatal("Infura is known to send incorrect blocks - please use your own nodes")
 	}
 
 	ethContractAddr := eth_common.HexToAddress(*ethContract)
 	bscContractAddr := eth_common.HexToAddress(*bscContract)
+	polygonContractAddr := eth_common.HexToAddress(*polygonContract)
 	solAddress, err := solana_types.PublicKeyFromBase58(*solanaContract)
 	if err != nil {
 		logger.Fatal("invalid Solana contract address", zap.Error(err))
@@ -506,6 +521,11 @@ func runNode(cmd *cobra.Command, args []string) {
 			return err
 		}
 
+		if err := supervisor.Run(ctx, "polygonwatch",
+			ethereum.NewEthWatcher(*polygonRPC, polygonContractAddr, "polygon", common.ReadinessPolygonSyncing, vaa.ChainIDPolygon, lockC, nil).Run); err != nil {
+			return err
+		}
+
 		// Start Terra watcher only if configured
 		logger.Info("Starting Terra watcher")
 		if err := supervisor.Run(ctx, "terrawatch",
diff --git a/node/pkg/common/readiness.go b/node/pkg/common/readiness.go
index 8f3beba0..aa3f999e 100644
--- a/node/pkg/common/readiness.go
+++ b/node/pkg/common/readiness.go
@@ -3,8 +3,9 @@ package common
 import "github.com/certusone/wormhole/node/pkg/readiness"
 
 const (
-	ReadinessEthSyncing    readiness.Component = "ethSyncing"
-	ReadinessSolanaSyncing readiness.Component = "solanaSyncing"
-	ReadinessTerraSyncing  readiness.Component = "terraSyncing"
-	ReadinessBSCSyncing    readiness.Component = "bscSyncing"
+	ReadinessEthSyncing     readiness.Component = "ethSyncing"
+	ReadinessSolanaSyncing  readiness.Component = "solanaSyncing"
+	ReadinessTerraSyncing   readiness.Component = "terraSyncing"
+	ReadinessBSCSyncing     readiness.Component = "bscSyncing"
+	ReadinessPolygonSyncing readiness.Component = "polygonSyncing"
 )
diff --git a/node/pkg/vaa/structs.go b/node/pkg/vaa/structs.go
index 31f31216..5155649f 100644
--- a/node/pkg/vaa/structs.go
+++ b/node/pkg/vaa/structs.go
@@ -91,6 +91,8 @@ func (c ChainID) String() string {
 		return "terra"
 	case ChainIDBSC:
 		return "bsc"
+	case ChainIDPolygon:
+		return "polygon"
 	default:
 		return fmt.Sprintf("unknown chain ID: %d", c)
 	}
@@ -106,6 +108,8 @@ const (
 	ChainIDTerra ChainID = 3
 	// ChainIDBSC is the ChainID of Binance Smart Chain
 	ChainIDBSC ChainID = 4
+	// ChainIDPolygon is the ChainID of Polygon
+	ChainIDPolygon ChainID = 5
 
 	minVAALength        = 1 + 4 + 52 + 4 + 1 + 1
 	SupportedVAAVersion = 0x01
diff --git a/proto/publicrpc/v1/publicrpc.proto b/proto/publicrpc/v1/publicrpc.proto
index f729f009..b3419622 100644
--- a/proto/publicrpc/v1/publicrpc.proto
+++ b/proto/publicrpc/v1/publicrpc.proto
@@ -13,6 +13,7 @@ enum ChainID {
   CHAIN_ID_ETHEREUM = 2;
   CHAIN_ID_TERRA = 3;
   CHAIN_ID_BSC = 4;
+  CHAIN_ID_POLYGON = 5;
 }
 
 // MessageID is a VAA's globally unique identifier (see data availability design document).