Tanjung Piai (Jawi: تنجوڠ ڤياي) is a cape in Pontian District, Johor, Malaysia.
It features seafood restaurants, perched on wooden jetties that are surrounded by a rugged and rarefied coastline of unspoiled mangrove forests.
0.33 nautical miles south of the point, at the edge of the dries, is a 15-metre light tower that flashes once every 3 seconds and houses a radar transponder beacon that transmits the Morse letter "M".
It is part of the Important Bird Area (IBA) of southwest Johor, which extends from Sunda Trench to Tanjung Piai.
The southwest Johor mangroves are ecologically important as a natural barrier for protecting the inland villages and agricultural lands from storm events, including tsunamis.