Diarmaid Byrnes (born 1994) is an Irish hurler who plays as a right wing-back for club side Patrickswell and at inter-county level with the Limerick senior hurling team.
On 23 October 2016, Byrnes won a Limerick Hurling Championship medal after scoring six points from centre-back in Patrickswell's 1-26 to 1-07 defeat of Ballybrown in the final.
Playing at centre-back, he scored two points, including a long-range free, and collected a second winners' medal following the 1-17 to 0-15 defeat of Na Piarsaigh.
[18] On 31 March 2019, Byrnes was selected at left wing-back for Limerick's National League final meeting with Waterford at Croke Park.
[19] On 30 June 2019, Byrnes won a Munster Championship medal after scoring three long-range frees from right wing-back in Limerick's 2-26 to 2-14 defeat of Tipperary in the final.