Sir Samuel Walker, 1st Baronet, PC (Ire), KC (19 June 1832 – 13 August 1911) was an Irish Liberal politician, lawyer and judge.

He was born at Gore Port, Finea, County Westmeath, a younger son of Captain Alexander Walker and his wife Elizabeth Elliott.

He quickly became one of the leaders of the Irish Chancery bar: in 1872 he was made a Queen's Counsel, and eleven years later he became Ireland's Solicitor General.

His celebrated remark that on entering the House of Commons "he was amazed to hear Members making factual statements without sworn affidavits to support them" was probably a joke.

An advocate for Home Rule, Walker remained within the Liberal Party after its split, and was eventually appointed Lord Chancellor of Ireland when Gladstone returned to power in 1892.