Founded in 1998 by a few internationals including current Chairman Ian Woodcock, Manhattan Celtic earned promotions in the Cosmopolitan Soccer League reaching the first division 10 years later. With success came growing interest and the addition of an Over 30 team that earned its first titles after three years. With membership passing 100 members, a second Over 30 was added and the teams competed as the Celtic Legends and the Celtic Bhoys. Over the past 5 years, the club membership swelled to close to 200 members with the addition of the Celtic Masters (Over 40) and the Celtic Aces (women).
In 2021, Manhattan Celtic's first team earned promotion to the EPSL. Following EPSL promotion, the reserve team was restructured into a D2 Firsts and Reserves teams. In 2023, Manhattan Celtic's CSL first team earned promotion back to D1. At the start of the 2023/24 season, Manhattan Celtic announced the rebirth of the Celtic Bhoys, which will be competing in CSL D4. The club now fields five teams (EPSL, Firsts (CSL D1), Reserves (CSL D1 Reserves), Bhoys (CSL D4) and Masters O-40) across four divisions with plans to expand again.