The 2018 Chesapeake Bayhawks season was the eighteenth season for the Chesapeake Bayhawks of Major League Lacrosse, and ninth using the Chesapeake moniker (the team was previously the Baltimore Bayhawks and the Washington Bayhawks).
The Bayhawks came into the year looking to improve upon their 7–7 finish in 2017 in which they finished sixth place in the league and missed out on the playoffs for the fourth consecutive year.
General manager Dave Cottle returned to the sidelines as head coach for the first time since 2015 after the Bayhawks and Brian Reese parted ways in September.
[1] In Cottle's first year back on the sidelines, the Bayhawks finished 9–5 and second place in the league.
In their return to the postseason, the Bayhawks lost to the Denver Outlaws in the semifinal round, 13–12.