George Washington Deitzler (November 30, 1826 – April 11, 1884) was a Union Army General during the American Civil War.

He received an order for one hundred Sharp's rifles which were very soon on their way to Kansas in boxes marked "books."

He served on committees, attended meetings and conventions, counseled with other leaders, and wrote for the press.

At the outbreak of the Civil War, Deitzler raised the 1st Kansas Infantry and was appointed its colonel.

He led his regiment in Missouri and commanded the 4th Brigade at the Battle of Wilson's Creek, where he was wounded.

During Confederate Major General Sterling Price's Missouri Expedition in 1864, Deitzler commanded 10,000 Kansas State Militia units in the Army of the Border.

The additional troops proved decisive as the Confederates, then outnumbered more than 2 to 1, were defeated at the Battle of Westport.

While in Southern Arizona in the spring of 1884, General Deitzler was thrown from a buggy and died from his injuries.

George Washington Deitzler was the great grandson of John Jacob Ditzler, born approximately 1765.

John Jacob Ditzler immigrated to Lancaster County, Pennsylvania from Germany with his brothers Thomas and Michael (Melchor) in the late 1700s.

The main facts of Deitzler's career are presented in his brief autobiography, now in the Archives of the Kansas State Historical Society.