Lou D'Alpuget was a rugby league player in the New South Wales Rugby League (NSWRL) competition who played for the Eastern Suburbs and Annandale clubs.
D'Alpuget, a halfback, played rugby league in 1908 - the founding year of the sport in Australia. He was a member of Eastern Suburbs first team, kicking the first ever goal for Eastern Suburbs.
D'Alpuget was a member of the Easts' side that was defeated by South Sydney in the NSWRL's first premiership final. D'Alpugent had just one season with the Eastern Suburbs club before joining the now defunct Annandale club. D'Alpuget's only representative match came in 1908 when he was selected for Sydney against a touring New Zealand Maori side.
A former rugby union player, D'Alpuget was a member of the rebel sides that played against the New Zealand 'All Golds' in the series that helped to establish rugby league in Australia.