[1] The club was founded on 1 June 1920 with the name Oss self-styled in caps, as a backronym standing for "exercise strengthens muscles".

With the support of the younger generation, the club switched on 19 September 1927 to the Brabant Football Association (BVB).

The older generation objected and priest Marcus, who had been with the club since the start, resigned from his function of "spiritual adviser".

In 1955, a merger proposal with SV Top resulting in entry into professional football was rejected by the members of Oss '20.

During the 2013–2015 seasons, Oss '20 was strengthened by Richard van der Venne.