Rienstra is a surname. Notable people with the surname include:
Ben Rienstra (born 1990), Dutch footballer Chad M. Rienstra, American professor Daan Rienstra (born 1992), Dutch footballer Dick Rienstra (1941–2021), Dutch singer and actor John Rienstra (born 1963), American football player Allan A. Rienstra (born 1966), Canadian basketball player and reliability leader