Lasioglossum ephialtum
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Hymenoptera
- family: Halictidae
- genus: Lasioglossum
- species: Lasioglossum ephialtum
Porter
Indiana- Orono
Maine- Adelphi
- Berwyn Heights
- Bladensburg
- Brentwood
- Brooklyn Park
- Chevy Chase Village
- Chillum
- College Park
- Colmar Manor
- Cottage City
- Edmonston
- Friendship Village
- Glenarden
- Greenbelt
- Hillandale
- Hunt Valley
- Hyattsville
- Langley Park
- Maryland City
- Mount Rainier
- Peppermill Village
- Riverdale Park
- Silver Spring
- Somerset
- Takoma Park
- Towson
- University Park
Maryland- North Sea
New York- Newport
Ohio- King of Prussia
Pennsylvania- Newport
Rhode Island- Wolf Trap
Virginia- Washington, D. C.
Washington, D.C.- Saint Marys
- Williamstown
West Virginia
United States