St Grellan's GFC

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{{Use dmy dates|date=June 2020}}

{{Use Hiberno-English|date=June 2020}}

{{Infobox GAA club

| club gaa = St Grellan's GFC

| irish = Cumann Peile Ghrealláin Naofa

| crest =

| province = Connacht

| county = Galway

| nickname =

| colours = Black and Amber

| grounds = Dunlo GAA Grounds

| coordinates = {{coord|53|19|51.01|N|8|13|42.69|W|display=it|region:IE_type:landmark}}

| f2 = 1

| f3 = 20

| body = FFC125

| leftarm = FFC125

| rightarm = FFC125

| shorts = 000000

| socks = 000000|

| County Intermediate Club Football = 3

}}

St Grellan's Gaelic Football Club ({{langx|ga|Cumann Peile Ghrealláin Naofa}}) was a Gaelic Athletic Association club based in Ballinasloe, County Galway, Ireland.{{cite web | last=Silke | first=Ray | title=Ballinasloe's glorious footballing history relived in 2010 calendar | website=Athlone Advertiser | date=11 December 2009 | url=https://www.advertiser.ie/athlone/article/20076/ballinasloes-glorious-footballing-history-relived-in-2010-calendar | access-date=15 February 2024}}

The team was named in honour of Saint Grellan, patron saint of Ballinasloe.

St Grellan's GFC were the first club to win a record seven Galway county football titles in a row from 1913 to 1919 and were undefeated in the county championship from 1913 to 1930. In 1980, they were also the first Galway Club to reach an All-Ireland Senior Club Football Championship in 1980.

On 1 December 2005, St Grellan's merged with Ballinasloe Hurling Club to form Ballinasloe GAA.