Neal Lloyd First (October 8, 1930 – November 20, 2014) was an American biologist.
He received the Animal Science Morrison Award, the Upjohn Research Award, the Society for the Study of Reproduction Research Award, the National Association of Animal Breeders Research Award and the Von Humboldt Award.
In 1996/7, he received the Wolf Prize in Agriculture "for his pioneering research in the reproductive biology of livestock".
[2] He was at the faculty of the University of Wisconsin–Madison when he received the prize.
He was also a member of the National Academy of Sciences.