However, according to a Galway Advertiser report, the club was active in 1933, winning a local junior competition known as the Celtic Shield.

[3][4][5][6][7] Galway United made a good start to the 1990s, winning their first FAI Cup and qualifying for Europe for a third time.

In 1996–97 United won the League of Ireland Cup defeating Cork City 4–2 over two legs along with the First Division Shield.

[9][11][12][13] However, after the 2011 League of Ireland Premier Division season, in which Galway United lost 32 out of 36 games, this arrangement broke down.

The O'Connor Report also recommended that GUST, Salthill Devon, Mervue United and the Galway Football Association, should work together to form such a club.

Following the conclusion of the 2013 season, both Mervue United and Salthill Devon withdrew from the League of Ireland First Division to make way for a team known as Galway F.C.

A new board of directors was established featuring representatives from GUST, Salthill Devon, Mervue United and the GFA.

[3] In 2015 the club had the opportunity to record a third League of Ireland Cup success when they played St. Patrick's Athletic in the final at Eamonn Deacy Park, however they lost the tie 4–3 in a penalty shoot out following a scoreless draw.

Following a vote of the supporters trust, 82% backed the move which would see the Comer brothers take an 85% ownership stake in the club.

They had announced an initial influx of half a million euro into the club with ambitions to take it back to the Premier Division.

On 23 July 2023 the women's team made history by winning the inaugural All-Island Cup in their maiden season, defeating Cliftonville Ladies F.C.

On 22 September 2023, Galway United won the League of Ireland First Division title for the second time in the club's history with five matches to spare, when they defeated Kerry FC 4–0.

[3][25] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.