Johnathan Lee Williams III (born May 22, 1995) is an American professional basketball player for the Qadsia SC of the WASL Gulf League.

[3] Williams capped off his incredible high school career by averaging 18.9 points and 9.5 rebounds, while leading Southwind to a 34–6 record and a state title.

[4] In his first collegiate game in an 89–53 win over Southeastern Louisiana on November 8, 2013, Williams posted 7 points, 6 rebounds, and 1 assist on 2-for-2 field goals and 3-of-4 free throws.

[7] On November 23, Williams grabbed career-highs of 17 rebounds and 2 steals to go along with 7 points, 3 blocks, and 2 assists on 3-for-10 field goals and 1-of-4 free throws in a win over Gardner-Webb.

[10] On March 5, 2014, Williams blocked a career-high 5 shots, along with 7 points and 8 rebounds on 3-of-7 field goals and 1-of-2 free throws, in a win over Texas A&M.

[11] In a double-overtime win over Texas A&M in the SEC Tournament on March 13, Williams dished out a career-high 4 assists to go along with a double-double (11 points and 15 rebounds), 2 blocks, and 1 steal on 3-of-7 2-pointers, 1-for-2 from 3-point land, and 2-of-2 free throw shooting.

[17] On December 2, he dropped 18 points, 11 rebounds, 1 assist, and 1 block on 5-for-9 field goals and 8-for-14 free throws in a win over Southeast Missouri State.

[18] In an overtime loss to Oklahoma State on December 30, Williams scored 22 points, along with 9 rebounds, 1 assist, and 1 steal on 6-of-10 2-point field goals, 2-of-3 3-pointers, and 4-of-7 free throws.

[19] On January 8, 2015, he had double-double (21 points and 10 rebounds) and 1 block on 8-for-17 field goal shooting and 5-for-8 free throws in a 74–67 win in overtime over LSU in the SEC opener.

[20] Williams had career-highs of 27 points and 3-of-5 from beyond the 3-point arc, along with 7 rebounds, 2 assists, and 1 block, on 6-for-10 2-pointers and 6-for-8 from the free throw line in a 77–74 loss against Mississippi State on February 14.

“He’s a proven commodity at high Division I level in scoring and rebounding, and he fits a real need for where our team and personnel makeup will be a year from now.

It’s a perfect scenario with being able to work with Nigel [Williams-Goss] and also, day-in and day-out, go against Kyle [Wiltjer], Domantas [Sabonis] and Przemek [Karnowski].

[25] After going undrafted in the 2018 NBA draft, Williams signed a contract offer from the Los Angeles Lakers to be on their Summer League team roster.

[47] Johnathan Williams helped the USA win a gold medal in the 2011 FIBA Americas U16 Championship, while averaging 5.4 points and 4.6 rebounds.

In 2012, Williams joined the US and won a gold medal in the FIBA U17 World Championship, while averaging 7 points and 4.6 rebounds in 16 minutes per game.