John M. Glass (1843–1925) was a mayor of Jeffersonville, Indiana, and Chief of Police of Los Angeles, California.

[1] In 1884 as Mayor he appealed to the Board of Trade Relief Committee to attempt to acquire several thousand pounds of meat, coffee, and bread to help stimulate the trade market in Jeffersonville.

When the money wasn't received John Glass claimed that some residents of the town had paid $1,250 to officers of the house of the 48th Congress.

[3] In April 1886 he resigned from his position and was then subject to examination of the House Civil Service Committee of charges of bribery.

Under political pressure, John Glass was replaced by Charles Elton.