The 2019–20 Wessex Football League season (known as the Sydenhams Football League (Wessex) for sponsorship reasons) was the 34th in the history of the Wessex Football League since its establishment in 1986. The league consisted of two divisions: the Premier Division and Division One. The season was abandoned on 26 March 2020, due to the COVID-19 pandemic.
The constitution was announced on 19 May 2019.
This season, the Premier Division champions were to be promoted to Step 4. The runners-up in this division and ten other Step 5 divisions in other leagues were to be ranked according to PPG (points per game), and the top four in that ranking would also have been promoted. The remaining seven runners-up would have competed in "winner takes all" play-offs with seven clubs finishing bottom in Step 4 leagues, the winners being placed at Step 4 and the losers at Step 5 for 2020–21.
The bottom clubs in all 14 Step 5 divisions were to be ranked according to PPG, and the 12 lowest-ranked clubs were to be relegated to Step 6.
In Division One, the top four clubs were to be promoted to Step 5, with the bottom two liable to relegation to Step 7.
League suspension and abandonment
Despite other leagues suspending all matches from 13 March due to the COVID-19 pandemic, the Wessex League continued to hold matches on 14 March. On 16 March, the FA decided to postpone all matches across all FA competitions until 3 April, and a league statement confirmed the postponement of all matches for the foreseeable future.
On 26 March 2020, the league season was formally abandoned, with all results being expunged, and no promotion or relegation taking place to, from, or between the two divisions. On 30 March 2020, sixty-six non-league clubs sent an open letter to the Football Association requesting that they reconsider their decision.