- Union Settlement records (1)
- United Neighborhood Houses of New York Records (13)
- United Service Organizations-related Records (2)
- United States Geological Survey Polar Maps (9)
- United States Youth Council Records (1)
- United Way of Minneapolis Records (1)
- University of Minnesota Archives Photograph Collection (1)
- University of Minnesota Gopher Yearbooks (24)
- Upper Midwest Jewish Archives Scrapbook Collection (5)
