William Thomas Miller (1865 – 6 October 1930) was a Northern Irish Unionist politician.
He unsuccessfully contested the North West Tyrone constituency in the 1918 United Kingdom general election, losing to Sinn Féin's Arthur Griffith.
In 1921, he was elected to House of Commons of Northern Ireland for the constituency of Fermanagh and Tyrone, and was re-elected in 1925.
He died in 1930 and at the subsequent by-election James Gamble was elected unopposed.
This article about a member of the 1921–1973 House of Commons of Northern Ireland or Senate of Northern Ireland is a stub.