Mehrtens is a surname. Notable people with the surname include:
Andrew Mehrtens (born 1973), New Zealand rugby union player George Mehrtens (1907–1954), New Zealand rugby union player Herbert Mehrtens (1946–2021), German historian of mathematics Warren Mehrtens (1920–1997), American Thoroughbred horse racing jockey William O. Mehrtens (1905–1980), United States district judge