At the initiative of the Trojans Rugby Club, a meeting was held on 13th April 1883 to discuss the formation of "The Hampshire County Rugby Football Union". In this inaugural season at least seven Trojans represented the County. The United Services proved to be the other early mainstay of the county side. In 1901 County activities had ceased. Once again, the Trojans, along with United Services Portsmouth RFC convened a meeting in 1910 at the Trojans Club for the purpose of forming a Rugby Football Union in Hampshire. Since then, with a notably strong side in the 1930s (drawn largely from the United Services) the county has won the County Championship twice, featuring in four finals. Their last appearance in the final was in 1962.
The county side has been in the final four times, winning the title on two occasions.