The centre-back's misfortune ultimately counted for little as Brighton ran out comfortable 4-1 winners to end Swansea's 10-match unbeaten run in all competitions.
4 - Lewis Dunk has scored four own goals in the Premier League this term - the joint-most by a player in a single season in the competition's history (also Martin Skrtel in 2013-14). Oops— OptaJoe (@OptaJoe) February 24, 2018
But he did earn unfortunate share of history when he got in the way of Tammy Abraham's long-range effort five minutes from time.
The ball took a hefty touch off Dunk and flew past the helpless Mat Ryan, giving Swansea the slightest glimmer of hope before Jurgen Locadia restored the three-goal advantage.
He moves level with Martin Skrtel, who set the record during the 2013-14 season at Liverpool.
After Saturday's victory, Brighton move up to 12th place in the Premier League and four points above Swansea, who occupy the final relegation spot.