William Henry Byrne (17 May 1844 – 28 April 1917) was an Irish architect who mainly designed churches.
[1][2] He studied under James Joseph McCarthy before going into business with John O’Neill in 1869.
[1] He worked on his own after O'Neill's death in 1883.
[1] In 1902, he took his son Ralph Henry Byrne into partnership, operating as "W.H.
[1] Byrne mainly designed churches, though his main Dublin work was the South City Markets in George's Street.