Sir William Moore Johnson, 1st Baronet, KC, PC (1828 – 9 December 1918) was an Irish politician, barrister and judge. He was held in great affection by the Bar, despite a reputation for obtuseness which led to his nickname "Wooden-headed Billy". He was described as "a monument of kindness and stupidity". He was created a Baronet (of Dublin) in the Baronetage of the United Kingdom on 24 November 1909 after his retirement from the court that year. The title became extinct on his death.