After World War II, the playing pitches were located in the Castle Grounds, Antrim.

In 1970, another pitch was acquired at the Lough Neagh shore on ground owned by the then club president.

An old stable in the Castle Grounds was converted into a clubhouse and premises developed at Allen Park.

Later at a special meeting in April 1995 the majority of those present decided to terminate the relationship with the Rugby Club.

[citation needed] The Ulster Senior League and Kirk Cup were both regularly won by Antrim.

The Cup, which had been on display in Hall's Hotel in Antrim, survived a terrorist bomb which exploded outside, severely damaging the building.

In the 1985–86 season the first team headed the League until well into the New Year before finally finishing third, behind Belfast YMCA and Banbridge.

[citation needed] In 2011–12, the first team gained promotion to the Premier League, having completed a double of winning both the Senior 1 title and the Linden cup.