Janis Lidmanis (1910–1986) was a Latvian footballer and basketballer.
In the 1930s he was the captain of Latvia national football team for which he made 55 appearances (second result in the pre-war Latvian team) and scored 2 goals.Lidmanis played of the football club Rigas FK, the top Riga club of that era, and together with Eriks Petersons and Sergejs Magers he made up the center midfield in the national team.
One of his strengths was in the hands (he also played basketball and even played for Latvia in EuroBasket 1935), he also performed corner-kicks.
In 1944 Lidmanis together with his family emigrated to Germany and in 1949 to Australia.
He died in Melbourne, Australia on 29 November 1986.