- United Way of Lake County, Inc.
- United Way of Lamar County
- United Way of Lamoille County
- United Way of Lancaster County
- United Way of Lancaster County
- United Way of Lane County
- United Way of Lapeer County
- United Way of Laramie County
- United Way of Laredo, Inc.
- United Way of Larimer County
- United Way of Lawrence County
- United Way of Lea County, Inc.
- United Way of Leavenworth County
- United Way of Lebanon County
- United Way of Lee County
- United Way of Lee County
- United Way of Lee, Hendry, Glades, and Okeechobee Counties
- United Way of Lewis County
- United Way of Licking County
- United Way of Lincoln and Lancaster County
- United Way of Lincoln County
- United Way of Logan County
- United Way of Logan County, Illinois
- United Way of Long Island
- United Way of Lowndes County
- United Way of Madison County
- United Way of Madison County
- United Way of Mahaska County
- United Way of Marathon County
- United Way of Marion County
- United Way of Marion County
- United Way of Marquette County
- United Way of Marshall County
- United Way of Marshall County
- United Way of Martin County
- United Way of Massachusetts Bay and Merrimack Valley
- United Way of Mat-Su
- United Way of Maury County
- United Way of McMinn and Meigs Counties
- United Way of McPherson, Inc.
- United Way of Medina County
- United Way of Merced County
- United Way of Mercer County
- United Way of Merrimack County
- United Way of Mesa County
- United Way of Metro Chicago
- United Way of Metropolitan Dallas
- United Way of Metropolitan Tarrant County
- United Way of Miami County, Inc.
- United Way of Miami County, Ohio