James Cronin (born 23 November 1990) is an Irish rugby union player, currently playing for Leicester Tigers in England's Premiership Rugby, he previously represented his native province of Munster in the URC and French club Biarritz in the Top 14.

[1] Cronin made his debut for Munster A on 8 December 2012, starting against Rotherham Titans in the British and Irish Cup.

[3] Cronin made his debut for the senior Munster team on 13 April 2013, coming on as a replacement against Leinster in a Pro12 fixture.

[15] Cronin came on in Munster's first European Rugby Champions Cup game against Sale Sharks on 18 October 2014.

[21] He came off the bench in Munster's opening 2015–16 European Rugby Champions Cup pool game against Benetton on 14 November 2015.

[23] In January 2016, Cronin signed a three-year contract extension with Munster, which will see him remain with the province until at least June 2019.

[27] He signed a two-year contract extension with Munster in October 2018, a deal that will see him remain with the province until at least June 2021.

[28] Cronin made his return from injury for Munster in their opening 39–9 victory against Welsh side Dragons in the 2019–20 Pro14 on 28 September 2019, his first competitive appearance since November 2018.

Though the independent judicial officer found that there "was no significant fault on behalf of the player, and that there were clear and compelling mitigating factors", it was determined that Cronin bore some responsibility for his failed test.

[32] Following his release by Munster, Cronin joined French club Biarritz, who had recently been promoted back to the Top 14, ahead of the 2021–22 season.