Icém is a municipality in the northern part of the state of São Paulo in Brazil. The population is 8,304 in an area of 362.59 km². It is part of the Microregion of São José do Rio Preto. It is also known as Princesa do Vale, or "Princess of the Valley." Icem is situated near the important urban centers of São José do Rio Preto, Olímpia, Catanduva, and Mirassol. The Marimbondo Dam, which forms a big reservoir in the Rio Grande, is situated close to Icém.