Lachlan Walmsley (born 12 June 1998) is a Scotland international rugby league footballer who plays as a winger and fullback for Wakefield Trinity in the Championship.

He previously played for Halifax in the 2022 RFL Championship and Whitehaven in League 1.

[4] He came through the youth system at the Newcastle Knights and reserve grade for the South Sydney Rabbitohs, and played for New South Wales under 18s in the State of Origin at youth level.

[8][9] He joined Halifax ahead of the 2022 season and was the top try-scorer for the Panthers in their 2022 season[10] and named (jointly with Dean Parata) as the 2023 Championship Player of the Year at the RFL annual awards.

[11] On 7 November 2023, it was reported that he had signed for Wakefield Trinity in the RFL Championship on a two-year deal.