Daniel J. Knuth (July 3, 1945 – October 5, 2020) was an American politician, educator, and environmental consultant.
He received his bachelor's degree in physical geography from Minnesota State University, Mankato and his master's and doctorate degrees in physical geography from Indiana University.
He worked as a hydrologist, as an environmental consultant and taught at Macalester College.
Knuth lived in New Brighton, Minnesota with his wife and family.
His daughter Kate Knuth and his brother-in-law Gordon Backlund also served in the Minnesota Legislature.