We report breeding success of Wilson's Plovers (Charadrius wilsonia) on St. Martin in the Lesser Antilles during 2004. We located 35 nests among six wetlands and apparent nest success was 37.1%. Nest initiation on St. Martin was earlier than in the United States and breeding success was higher earlier in the season than later in the season. There were two distinct peaks in nest initiation; the second peak coincided with peak fledging of chicks from the first nest initiation. Nests on St. Martin were associated with bare ground and were much closer together than in previous studies reported elsewhere. Ten nests were predated by feral dogs (Canis lupus familiaris) and three nests were crushed by vehicles.