Basildon United's roots go back to 1955, when a club named
Armada Sports was formed, joining Division One of the Southend & District League. In 1959 Armada Sports merged with
London League club Pitsea United, with Pitsea United effectively absorbing Armada Sports. However, Armada Sports later split from Pitsea United and were renamed Basildon United in 1967. The club joined the Thurrock Thames-side Combination League for the 1967–68 season, before switching to the Reserves Division Two of the
Greater London League in 1968. After finishing as runners-up in the division in 1969–70, they were promoted to Reserves Division One. In 1971 the club were founder members of the Essex Senior League (ESL). They finished as runners-up in 1972–73, before winning the league in 1976–77. The club went on to win the league for the next three seasons, as well winning the League Cup in 1977–78, before switching to the
Athenian League in 1980. ==Ground==