2020–21 Eerste Klasse was an Eerste Klasse season. The teams were near-identical to the 2019–20 Eerste Klasse season, after the COVID-19 pandemic in the Netherlands caused the KNVB to decide that there would be no relegation and promotion following the previous season. A few teams promoted anyway to the Hoofdklasse and Eerste Klasse.
The league commenced on 22 August 2020 for the Saturday sections and 23 August for the Sunday sections[1] and were curtailed on 24 February 2021, when the KNVB discontinued category A senior competitions in this season, including Eerste Klasse, again without promotion or relegation.[2]