The following is a summary of Down county football team's 2018 season.
Competitions.
 ;templatestyles src="Legend/styles.css" / ;  Win
 ;templatestyles src="Legend/styles.css" / ;  Draw
 ;templatestyles src="Legend/styles.css" / ;  Loss
 ;templatestyles src="Legend/styles.css" / ;  Postponed/Cancelled
Dr McKenna Cup.
The draw for the 2018 Dr McKenna Cup was made in November 2017.
Fixtures.
Down's tie against the University of Ulster was postponed due to an unplayable pitch.
National Football League Division 2.
Down played in Division Two of the National Football League in 2018.
Fixtures.
Fixtures for the 2018 National League were announced on 13 October 2017. Down's fifth fixture against Cavan was postponed due to 2018 Great Britain and Ireland cold wave. The game was rescheduled for 10 March 2018. Due to further snow in March the fixture against Tipperary on 18 March was also postponed.
Despite a victory on the final day of the campaign, Down were relegated to Division 3 following a win for Meath over Louth on the same day.
Ulster Senior Football Championship.
The draw for the 2018 Ulster Senior Football Championship took place on 19 October 2017, with Down being drawn at home to Antrim in the quarter-final stage. Down progressed to the Ulster semi-finals but lost to Donegal in Clones on 10 June.
References.
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