Wisconsin lakes: U
62 lakes
- Ucil LakeOconto
- Ueeck LakeWaushara
- Underwood LakeOconto
- Upper Aimer LakeVilas
- Upper and Lower Buckatabon 14 RerservoirVilas
- Upper Basin 0.34 ReservoirPierce
- Upper Buckatabon LakeVilas
- Upper Clam LakeAshland
- Upper Demlow LakeLanglade
- Upper Devils LakeBarron
- Upper Doubles LakeCrawford
- Upper Eau Claire LakeBayfield
- Upper First LakeLanglade
- Upper Genesee LakeWaukesha
- Upper Gresham LakeVilas
- Upper Hiwanka LakeLanglade
- Upper Holly LakeSawyer
- Upper Island LakeOconto
- Upper Kaubashine LakeOneida
- Upper Kelly LakeWaukesha
- Upper Kimball LakeWashburn
- Upper Kinnickinnic PondPierce
- Upper LakeMarinette
- Upper LakeLanglade
- Upper Lost LakeDoor
- Upper MaraisCrawford
- Upper Mayville Millpond 172Dodge
- Upper Mud LakeDane
- Upper Nashotah LakeWaukesha
- Upper Nashotah Lake 3Waukesha
- Upper Nemahbin LakeWaukesha
- Upper Ninemile LakeVilas
- Upper North Fork FlowageBurnett
- Upper Oconomowoc LakeWaukesha
- Upper Ox LakeDouglas
- Upper Park Falls Flowage 760Price
- Upper Phantom FlowageBurnett
- Upper Post LakeLanglade
- Upper Price LakePrice
- Upper Range LakeOconto
- Upper Red LakeShawano
- Upper ReservoirMenominee
- Upper Saint Croix LakeDouglas
- Upper Scott Flowage 4060Marinette
- Upper Sparta PondMonroe
- Upper Spirit LakeBarron
- Upper Spring LakeJefferson
- Upper Springstead LakeIron
- Upper Steve Creek FlowageTaylor
- Upper Steve Creek Flowage 9Taylor
- Upper Sugarbush LakeVilas
- Upper Tigerton PondShawano
- Upper Turtle LakeBarron
- Upper Twin LakeChippewa
- Upper Twin LakeBurnett
- Upper Ventor LakeLanglade
- Upper Vermillion LakeBarron
- Upper Wapato LakeOconto
- Upper Waterman LakeBarron
- Upper Wolf LakeLanglade
- Upson LakeIron
- Utica LakeWaukesha