Aaron Harrison Cragin (February 3, 1821 – May 10, 1898) was an American politician and a United States Representative and Senator from New Hampshire.

[1] While in the House of Representatives, he was chairman of the Committee on Expenditures in the Department of War (Thirty-fourth Congress).

Cragin resumed the practice of law and in 1859 was again a member of the State house of representatives.

[4] Appointed by President Rutherford Hayes as one of the commissioners for the purchase of the Hot Springs Reservation in Arkansas, Cragin served as chairman from 1877 to 1879.

Son of Aaron and Sarah Whitney, Cragin married Isabella Tuller and they had a son, Harry Wilton Cragin, who graduated from Yale University and was appointed third assistant in the United States Patent Office.