Halkyn United Football Club was formed in 1945 in the aftermath of the Second World War and became founder members of the old Halkyn Mountain League, which was a forerunner to the Clwyd League. It is believed that during this time the club played their home games on various grounds in the village of Pentre Halkyn. 

The earliest honours won by Halkyn were the Mountain League in 1956 and the League Cup in 1959.

In 1975 the club joined the Clwyd League and played their home matches in Pentre Halkyn on a field owned by the council, which was adjacent to the Village Park. The changing facilities where the nearby Community Centre.

With many of the current long serving officials involved with the club success started to arrive at the club in the late 1980’s and the 1990’s. In the 1992/93 season the club won the Clwyd League Division One title and with it promotion to the Premier League.

 In the first season in the Premier League despite finishing midway in the league United won both the Presidents Cup and the Arrows Cup.

Further progress up the pyramid system was achieved in the season 1994/95 with promotion as champions from the Clwyd League Premier Division to the Welsh Alliance. Success continued with the prestigious Barritt Cup making it’s way to Halkyn in the season 1995/96 and the Cookson Cup the following season.

Throughout their four years in the Welsh Alliance the club competed well and made steady progress. In the 1997/98-season a 4th place finish was achieved behind runaway champions Holyhead Hotspurs.

The following season brought the club down to earth with an indifferent season culminating in a mid-table finish. However the season 1999/2000 season proved the most successful in the clubs history as they won the Tyn Lon Rover Welsh Alliance by a clear 11 points whilst remaining unbeaten in the League.

Added to that the club progressed to the 4th round of the Welsh Cup including an away victory at League of Wales outfit Haverfordwest.

Promotion to the Cymru Alliance meant work was required at Pant Newydd to bring the ground up to the required standard. A makeshift stand was built and changes made to the rooms and the showers.

More changes are in the pipeline as Halkyn strive to continue building the football club.