Oudemans is a surname. Notable people with the surname include:
Anthonie Cornelis Oudemans (1858–1943), Dutch zoologist, son of Jean Corneille Antoine Jean Abram Oudemans (1825–1906), Dutch botanist and physician Jean Abraham Chrétien Oudemans (1827–1906), Dutch astronomer Oudemans (crater), a crater on Mars named after Jean Abraham Chrétien Oudemans