Loudonville is a hamlet in the town of Colonie,[2][3] in Albany County, New York, United States.

[4][5] The hamlet is named after John Campbell, 4th Earl of Loudoun and was originally a 19th-century summer resort for some of Albany's wealthiest residents.

[11][12] Ireland's Corners is named for Elias H. Ireland who in 1832 bought the heavily wooded area from the Patroon, Stephen Van Rensselaer.

[13] In 1871 the post office at Ireland's Corners was renamed Loudonville.

[13] The community is located directly north of Albany and south of Newtonville.