15°07′57″N 145°41′37″E / 15.132500°N 145.693611°E San Antonio is a settlement in Saipan, in the Northern Mariana Islands. It is close to the southwestern tip of the island. Once a separate village, it is now virtually contiguous with other nearby villages on Beach Road (Highway 33), including Susupe, Chalan Kanoa and Chalan Piao.