Thomas Gordon Hayes (January 5, 1844 – August 27, 1915) was a Democratic politician and lawyer, who served as the United States District Attorney for Maryland from 1886 to 1890 and as the Mayor of Baltimore from 1899 to 1903.

When the Civil War began, Hayes served in the Confederate army along with 247 VMI cadets who fought at the Battle of New Market.

[1] After the end of the Civil War, he came to Baltimore but soon returned to Virginia where he graduated in 1867 and started as an assistant professor of mathematics.

Hayes later moved to the Kentucky Military Institute, near Frankfort, where her served as a professor of natural sciences.

On June 1, 1886, President Grover Cleveland appointed Hayes as the United States District Attorney for Maryland.