Nicolasa is a feminine given name. People with the name include:
María Nicolasa de Iturbide (1774-1840), Princess of Iturbide Nicolasa Dayrit Panlilio (1874-1945), Filipina non-combatant in the Philippine–American War Nicolasa Escamilla (known as "La Pajuelera"; fl. 1747 – fl. 1776), Spanish bullfighter Nicolasa Machaca (born 1952), Bolivian union leader and health care worker Nicolasa Montt (1857–1924), Chilean poet, writer, translator Nicolasa Pradera (1870–1959), Basque chef, restaurateur, cookbook author Nicolasa Quintremán (1939-2013), Chilean Pehuenche activist Nicolasa Valdés (1733-1810), First Lady of Chile