The club was established in 1975 as a youth team under the name Harborough Town Juniors, with the modern club formed by a merger with adult team Spencer United in 2008. Spencer United joined Division Five of the Leicester & District Mutual League in 1976. They were Division Five champions in 1977–78 and were promoted to Division Two. earning promotion to the Premier Division. In 2002 the club were renamed Harborough Spencer United. earning promotion to Division One of the
United Counties League. Although they finished bottom of Division One in their
first season in the league, the club were Division One runners-up in
2011–12 and were promoted to the Premier Division. After defeating
Tonbridge Angels 4–1 in the first round, they were beaten 5–3 by
Reading after extra time in the second round. They went on to
finish fifth in the Premier Division Central, before losing to
Kettering Town on penalties in the play-off semi-finals. ==Ground==