James Harry Preston (March 23, 1860 – July 14, 1938) was the Mayor of Baltimore from 1911 to 1919.

From 1920 to 1921, he served as president general of the National Society of the Sons of the American Revolution.

[3] Preston was backed by political boss John J. Mahon for nomination for Mayor of Baltimore in 1911.

[1][3] During his tenure as Mayor, the Hanover Street Bridge was built and the Baltimore Symphony Orchestra was founded.

[3] In 1919, he was defeated by George Weems Williams in the primary election for mayor.

[1][3][4] His brother was Walter W. Preston, an associate judge of the third judicial court.

[3] His family lived in a mansion on Charles Street in Baltimore built by William Key Howard in 1870.