The team finished third in their conference, qualifying for the play-offs for the first time since the 2015–16 season where they were beaten by Ulster in the quarter-final.

The second competition was the Cara Cup, which involved the Irish provinces and the New England Free Jacks, a newly established Major League Rugby side.

Following the removal of head coach Kieran Keane one year into a three-year deal, Andy Friend was hired as his replacement.

The Connacht senior squad for 2018–19 was:[14][a][b] Note: Flags indicate national union under World Rugby eligibility rules.

The Connacht academy squad for 2018–19 was:[20] Note: Flags indicate national union under World Rugby eligibility rules.