Alexander Preston Ellinwood (September 9, 1833 – February 6, 1900) was an American businessman, teacher, and politician.
During the American Civil War, Ellinwood served in the 19th Wisconsin Volunteer Infantry Regiment and was a captain.
After the war, he returned to Reedsburg to teach, and was also involved with real estate, the lumber and general merchandise businesses.
In 1878 and 1879, Ellinwood served in the Wisconsin State Assembly as a Republican.
This article about a Republican Party member of the Wisconsin State Assembly born in the 1830s is a stub.