科尔内希思

The club was established in 1907 and initially played in the Hatfield District League. After World War I they joined the Mid-Herts League, and their most successful period in the league came after World War II, with the club winning the Division One and Premier Division titles, as well as the Mid Herts Benevolent Shield (twice) and the Bingham Cox Cup. In 1953 the club moved up to Division Two of the Hertfordshire Senior County League, which they won at the first attempt to earn promotion to Division One. In 1955 the club were placed in Division One A as the league was reorganised; they went on to win the division in 1955–56 and were placed in the new Premier Division for the following season. In 1958–59 they were Premier Division champions, and the following season saw them win both the Aubrey Cup and the Hertfordshire Intermediate Cup.

In 1965–66 Colney Heath finished second-from-bottom of the Premier Division and were relegated back to Division One. They were relegated again at the end of the 1968–69 season, returning to Division Two. Another relegation in 1975–76 saw them playing in Division Three. However, after finishing as runners-up in 1979–80 the club were promoted back to Division Two. A fourth-place finish in 1983–84 was enough to see them promoted to Division One, and after finishing third in Division One in 1985–86, they returned to the Premier Division. Their first season back in the Premier Division ended in relegation to Division One, but the club were Division One champions in 1988–89, earning promotion back to the Premier Division. In 1995–96 they won the Hertfordshire Senior Centenary Trophy, which they retained the following season.

The 1999–2000 season saw Colney Heath win the Premier Division of the Hertfordshire Senior County League, resulting in promotion to the Senior Division of the Spartan South Midlands League, which was renamed Division One in 2001. They were Division One champions in 2005–06, earning promotion to the Premier Division. In 2010–11 the club won the Premier Division Cup. They won the Hertfordshire Charity Shield in 2013–14, 2017–18 and 2018–19.

In the 2019–20 season, Colney Heath were six points clear at the top of the table with a game in hand by mid-March, but the season was then abandoned due to the COVID-19 pandemic. Following the 2020–21 season, which was also curtailed due to the COVID-19 pandemic, they were promoted to Division One Central of the Southern League. However, their first season in the Southern League saw them finish second-from-bottom of Division One Central, resulting in relegation back to the Premier Division of the Spartan South Midlands League.