Joseph R.T. Coates

Joseph R.T. Coates was an American politician from Pennsylvania who served as mayor of Chester, Pennsylvania from 1887 to 1893. He was an officer in the Pennsylvania Reserves infantry division of the Union Army in the U.S. Civil War and served in some of the key battles of the war.

Military service
In 1861 Coates was mustered in as a 1st lieutenant to the 1st Pennsylvania Reserve Regiment, also known as the 30th Pennsylvania Volunteer Infantry, Company C. Recruited out of Chester, Company C was first known as the "Keystone Guards" and then known for a time as the "Slifer Phalanx".

Coates and Company C served at the Battle of Mechanicsville, the Battle of New Market, Second Battle of Bull Run, the Battle of Antietam, the Battle of Fredericksburg, the Battle of Gettysburg, the Battle of Bristoe Station and the Battle of Bethesda Church.

Coates was promoted from 1st lieutenant to captain in 1862 and to Major by brevet in 1864.

On June 13, 1864, Coates was mustered out with the company.

Career
Coates served as Postmaster of the Chester Post Office from 1865 to 1869.

Coates served as mayor of Chester from 1887 to 1893 and was succeeded by John B. Hinkson.