Hylaeus affinis
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Hymenoptera
- family: Colletidae
- genus: Hylaeus
- species: Hylaeus affinis
Bridgeville- Greenville
- Wilmington
Delaware- Brownstown
- Porter
Indiana- Adelphi
- Aspen Hill
- Bartonsville
- Beltsville
- Berwyn Heights
- Bladensburg
- Boonsboro
- Bowie
- Brentwood
- Brooklyn Park
- Cheverly
- Chevy Chase
- Chevy Chase Village
- Chillum
- College Park
- Colmar Manor
- Columbia
- Cottage City
- East Riverdale
- Easton
- Edmonston
- Fort George G Mead Junction
- Friendship Village
- Glenn Dale
- Greenbelt
- Hagerstown
- Halfway
- Hunt Valley
- Hyattsville
- Landover
- Landover Hills
- Langley Park
- Layhill
- Leisure World
- Maryland City
- Mellwood
- Mitchellville
- Mount Airy
- Mount Rainier
- Mountain Lake Park
- New Carrollton
- Oakland
- Pikesville
- Riverdale Park
- Rossmoor
- Selby-on-the-Bay
- Somerset
- Spring Ridge
- Takoma Park
- Towson
- University Park
- Williamsport
- Woodlawn
Maryland- South Haven
Michigan- Wingate
North Carolina- Collingdale
- Colonial Park
- Colwyn
- Darby
- Penbrook
- Progress
- Sharon Hill
- Valley Green
Pennsylvania- Lovettsville
- Wolf Trap
- Woodbridge
Virginia- Washington, D. C.
Washington, D.C.- Saint Marys
- Terra Alta
- Williamstown
West Virginia
United States