David George Ashworth (2 June 1867 – 1947) was an English football referee and manager.

He became the first manager of Oldham Athletic in 1906, spending eight successful years there before moving on to manage Stockport County in 1914 and staying with them through the First World War.

The following season, 1921/22, Ashworth led Liverpool to their third League Championship.

The team were well on their way to a second successive Championship the following season, when in February 1923 Ashworth left the table-topping side to return to Oldham, then at the bottom of the league.

Ashworth remained at Oldham for just over a year before moving to Manchester City, but he resigned in 1925 as the club struggled towards relegation.