São Nicolau

São Nicolau, meaning "Saint Nicholas" in Portuguese, may refer to the following places:

Brazil

 * São Nicolau (Rio Grande do Sul), a municipality of the state of Rio Grande do Sul
 * São Nicolau River, a river in the state of Piauí

Cape Verde

 * São Nicolau, Cape Verde, an island

Portugal

 * São Nicolau, Lisbon, a parish of the municipality of Lisbon
 * São Nicolau, Porto, a parish of the municipality of Porto
 * São Nicolau, Marco de Canaveses, a parish of the municipality of Marco de Canaveses
 * São Nicolau, Mesão Frio, a parish of the municipality of Mesão Frio
 * São Nicolau, Santarém, a parish of the municipality of Santarém.