William Likely III (born September 13, 1994) is an American former professional football cornerback. He played college football at the University of Maryland.

On September 5, 2015 Likely broke a 76 year old Big Ten Conference single-game record when he returned 8 punts for 233 yards in the season opener against Richmond. He was selected by both the coaches and media as a first-team return specialist and also a first-team defensive back by the coaches on the 2015 All-Big Ten team.

Likely played for the Maryland Terrapins from 2013 to 2016.

Likely signed with the Patriots as an undrafted free agent on June 5, 2017. He was waived on September 2, 2017.

The Toronto Argonauts signed Likely to their practice squad on August 21, 2018.

Likely was signed to the Hamilton Tiger-Cats' practice roster on June 18, 2019. He was promoted to the active roster on July 12, and demoted to the practice roster on July 31. He was promoted again on September 19, and demoted again on September 26. He was released from the practice roster after the season on November 26, 2019.

Likely signed with the DC Defenders of the XFL during mini-camp in December 2019. He was waived during final roster cuts on January 22, 2020.

Likely was selected in the 9th round of the 2022 USFL draft by the Houston Gamblers.