| Charles August Sulzer | |
| Office: | Delegate to the U.S. House of Representatives from Alaska Territory's at-large district |
| Term Start: | March 4, 1919 |
| Term End: | April 15, 1919 |
| Preceded: | James Wickersham |
| Succeeded: | George Barnes Grigsby |
| Term Start1: | March 4, 1917 |
| Term End1: | January 7, 1919 |
| Preceded1: | James Wickersham |
| Succeeded1: | James Wickersham |
| Birth Date: | 24 February 1879 |
| Birth Place: | Roselle, New Jersey, U.S. |
| Death Place: | Aboard a boat between Sulzer, Alaska and Ketchikan, Alaska, U.S. |
| Resting Place: | Evergreen Cemetery, Hillside, New Jersey |
| Party: | Democratic |
| Relations: | William Sulzer (brother) |
| Allegiance: |  United States |
| Serviceyears: | 1898 |
| Unit: | Fourth Regiment, New Jersey Volunteer Infantry |
| Battles: | Spanish–American War |
Charles August Sulzer (February 24, 1879 – April 15, 1919) was a delegate to the United States House of Representatives from the Territory of Alaska from 1917 to 1919.
Sulzer was born on February 24, 1879, in Roselle, New Jersey in Union County, the son of Lydia (Jelleme), who was Frisian, and Thomas Sulzer, a German immigrant. He attended the public schools, Pingry School in Elizabeth, New Jersey, Berkeley Academy in New York City, and the United States Military Academy at West Point, New York. During the Spanish–American War, he served with the Fourth Regiment, New Jersey Volunteer Infantry. Charles Sulzer moved to Alaska in 1902 and engaged in mining.
He was a member of the Alaska Territorial Senate in 1914. He presented his credentials as a Democratic delegate-elect to the Sixty-fifth Congress and served from March 4, 1917, to January 7, 1919, when he was succeeded by James Wickersham, who had contested his election. He later presented his credentials as a Delegate-elect to the Sixty-sixth Congress and served from March 4, 1919, until his death on April 15, 1919, before the convening of Congress. According to published accounts on April 16, Sulzer took ill in Sulzer and died aboard a boat while en route to a hospital in Ketchikan. He was interred in Evergreen Cemetery in Hillside, New Jersey. His brother, William Sulzer, was also a congressman and a governor of New York.