哥伦布日（英语：Columbus Day）是美洲部分国家的节日，用以纪念克里斯托弗·哥伦布于1492年发现美洲新大陆，为10月12日、或10月的第二个星期一。在美国，多数银行、学校于该日放假。西班牙国庆日（西班牙语：Fiesta Nacional de España）亦定于同日（10月12日），纪念理由与哥伦布日相同。

在巴哈马，哥伦布日被称之为发现日（英语：Discovery Day），拉丁美洲大部分国家称之为居民日或拉丁人日（西班牙语：Día de la Raza），伯利兹和乌拉圭称之为美洲人日（西班牙语：Día de las Américas），阿根廷称之为尊重文化多样性之日（西班牙语：Día del Respeto a la Diversidad Cultural），意大利和世界各地的小意大利称之为克里斯托弗·哥伦布国家日（意大利语：Giornata Nazionale di Cristopher Columbus）或克里斯托弗·哥伦布国家嘉年华日（意大利语：Festa Nazionale di Cristoforo Colombo）。

Columbus Day is a national holiday in many countries in the Americas and elsewhere which officially celebrates the anniversary of Christopher Columbus' arrival in and discovery of America, which happened on October 12, 1492. The landing is celebrated as Columbus Day in the United States, as Día de la Raza ("Day of the Race") in many countries in Latin America and as Día de la Hispanidad and Fiesta Nacional in Spain, where it is also the religious festivity of La Virgen del Pilar. It is also celebrated as Día de las Américas (Day of the Americas) in Belize and Uruguay, as Discovery Day in the Bahamas, as Día del Respeto a la Diversidad Cultural (Day of Respect for Cultural Diversity) in Argentina and as Giornata Nazionale di Cristoforo Colombo or Festa Nazionale di Cristoforo Colombo in Italy and in the Little Italys around the world. These holidays have been celebrated unofficially since the late 18th century and officially in various countries since the early 20th century.