John Williamson (born August 19, 1986) is an American professional basketball player who last played for Maccabi Kiryat Gat of the Liga Leumit.

Williamson averaged 27.4 points and 11.7 rebounds leading the school to a 26–9 record, state and regional titles and the finals of the National Junior College Athletic Association Tournament.

Before his junior season he transferred to the University of Cincinnati for his final two years of college.

Williamson finished third in the BIG EAST in offensive rebounding (3.3) and ninth overall.

On November 6, 2013, he signed with the Nilan Bisons after playing for Fos Ouest Provence Basket.