Finaeon covers Dow Jones Composite Averages from 1933 to present.

Sage Data includes Dow Jones Industrial Averages (high, low, close, open volume) from 1980-2022 . Click Subject under Browse Data by, then select Dow Jones and select a data series of interest.

FRED (Federal Reserve Economic Data) from the St. Louis Fed, has the most recent 10 years of data for the DJIA.