In 1916 a number of of citizens of Monaghan town decided to start a golf club. THey approached the right Honourable Derrick Warner William, fifth Lord Baron Rossmore with a request that he should lease them part of his demesne. Lord Rossmore agreed to let 65 acres to the trustees of the club at the nominal rent of one shilling (2.5 pence) per year. Also included in the letting was a gate lodge that was used as the club house. A meeting, over which Lord Rossmore presided, was held in the western Arms Hotel on the 16th of August 1916 and the Golf Club was formed.

A mysterious fire destroyed the gate lodge in 1925 and many members lost golf clubs and equipment. Damages amounting to 1,262 pounds were awarded to the club and the members and with this money a new club house was built. It was opened in 1927. This clubhouse survived until 1984 when the present clubhouse was opened.

The original course was nine holes but it was extended to 18 holes in 1992. Since then several holes have been re-designed to make more use of the many lakes and streams and rivers throughout the course. Now with so many challenging holes it has championship potential and will test the best of golfers.

Many famous people and notable golfers have played at rossmore: Fred Daly (ex British Open and Ryder Cup) was regular visitor, Darren Clarke suffered defeat at the hands of Rossmore Club Members during his amateur inter-club days, while Norman Drew (ex walker and Ryder Cup) was club professional for a number of years.