Lewis David Ritson (born 22 September 1993) is a British professional boxer. He held the British lightweight title from 2017 to 2018 and challenged once for the European lightweight title in 2018.
Ritson made his professional boxing debut in April 2015 with a points win over Kristian Laight at the Metro Radio Arena in Newcastle. He went on to box a further six times throughout the remainder of the year, winning all six; two by knockout. Ritson won all five of his fights in 2016, culminating in him securing the BBBofC Northern Area lightweight title with a seventh-round knockout win over Jordan Ellison on 3 December 2016. As a result of his early performances as a professional, Ritson received interest from promoters Eddie Hearn, Barry McGuigan and Frank Warren.