Robert W. Mattson Jr.
24th Minnesota State Treasurer
In office January 2, 1983 – January 5, 1987
Governor	Rudy Perpich
Preceded by	Jim Lord
Succeeded by	Michael A. McGrath
13th Minnesota State Auditor
In office January 6, 1975 – January 4, 1979
Governor	Wendell Anderson Rudy Perpich
Preceded by	Rolland Hatfield
Succeeded by	Arne Carlson
Personal details
Born	(1948-05-31) May 31, 1948 (age 76) Virginia, Minnesota, U.S.
Political party	Minnesota Democratic-Farmer-Labor
Spouse	Marge
Profession	entrepreneur

Robert W. (Bob) Mattson Jr. (born May 31, 1948) is an American lawyer who held elective political office in Minnesota, and is also involved in various business ventures in Florida, Colorado and Canada. He served one term as Minnesota State Auditor from 1975 to 1979, and was Minnesota State Treasurer from 1983 to 1987. He is a member of the Democratic–Farmer–Labor Party.^[1][2] His father was Minnesota Attorney General Robert W. Mattson Sr.

Mattson was elected State Auditor at the age of 26, the second-youngest to attain statewide office in Minnesota; the distinction of being the youngest goes to Jim Lord, who was 25 when elected State Treasurer.

Mattson was born in Virginia, Minnesota. He is a graduate of Bloomington Kennedy High School in Bloomington, Minnesota, Harvard University in Cambridge, Massachusetts, and William Mitchell College of Law in Saint Paul. His business ventures include Michelbobs Championship Ribs restaurants in Naples, Florida and Cochrane Air Service in Cochrane, Ontario, Canada.^[3]

Mattson and his wife, Marge, are the parents of two daughters, Kimberly and Jennifer. Kimberly operates Kimberly Boutique stores in West Hartford and Guilford, Connecticut, and Jennifer is an attorney in Saint Paul.