They play their home games at Haslett Park, next door to their local rivals Carrick Rangers.
The current club formed in 1954 taking its name from an earlier team, Barn, which played in the Irish League from 1923 to 1928.
United joined the Northern Amateur League as a junior club in 1955, before being elevated to intermediate status in 1961.
Barn United found new rivals in Islandmagee with the teams meeting annually to play for a trophy.
[citation needed] But the fixture was marred by a series of on-field incidents and trouble between the opposing fans.