Walter Ernest Peterson (born 7 November 1883) was an Ireland men's field hockey international.

[1] He was a member of the Ireland team that played at the 1908 Summer Olympics, winning a silver medal.

Peterson was one of six brothers who played field hockey for Avoca, Palmerstown and Ireland.

Walter Peterson was born into a Church of Ireland family on 7 November 1883 at Ulster Terrace, Stillorgan, County Dublin.

The two defeats were both cup matches against Dublin University, and both games were lost by a single goal.

After Palmerstown disbanded in 1907, most of the brothers, including Walter and Jack moved to Monkstown where he won two more Irish Senior Cup titles in 1911 and 1914.

[2] Walter and Jack Peterson were both members of the Ireland team that played at the 1908 Summer Olympics, winning a silver medal.