1965–66 Yorkshire Football League

The 1965–66 Yorkshire Football League was the 40th season in the history of the Yorkshire Football League, a football competition in England.

Division One
Division One featured 12 clubs which competed in the previous season, along with four new clubs, promoted from Division Two:
 * Barton Town
 * Frickley Colliery reserves
 * Goole Town reserves
 * Stocksbridge Works

Division Two
Division Two featured eleven clubs which competed in the previous season, along with six new clubs.
 * Clubs relegated from Division One:
 * Brodsworth Miners Welfare
 * Harrogate Railway Athletic
 * Hull Brunswick
 * Plus:
 * Denaby United, relegated from the Midland League
 * Heeley Amateurs
 * Leeds Ashley Road