Allen, Allen's or Allens may refer to:
- Allen (brand), an American tool company
- Allen's, an Australian brand of confectionery
- Allens (law firm), an Australian law firm formerly known as Allens Arthur Robinson
- Allen's (restaurant), a former hamburger joint and nightclub in Athens, Georgia, United States
- Allen & Company LLC, a small, privately held investment bank
- Allens of Mayfair, a butcher shop in London from 1830 to 2015
- Allens Boots, a retail store in Austin, Texas
- Allens, Inc., a brand of canned vegetables based in Arkansas, US, now owned by Del Monte Foods
- Allen's department store, a.k.a. Allen's, George Allen, Inc., Philadelphia, USA
United States
- Allen, Alabama, an unincorporated community in Clarke County, Alabama
- Allen, Arizona, a ghost town
- Allen, Kansas, a city
- Allen, Kentucky, a city
- Allen, Louisiana, an unincorporated community
- Allen, Maryland, an unincorporated community
- Allen, Michigan, a village
- Allen, Mississippi, an unincorporated community
- Allen, Nebraska, a village
- Allens, an alternate name for Allens Station, New Jersey, an unincorporated community
- Allen, New York, a town
- Allen, Oklahoma, a town
- Allen, South Dakota, a census-designated place
- Allen, Texas, a city
- Allen, West Virginia, an unincorporated community
- Allen, Wisconsin, an unincorporated community
- Allen Township (disambiguation)
- Allen County (disambiguation)
- Allen Parish, Louisiana
- Allen Mountain (Montana)
- Allen Mountain (New York)
- Allen Island (Maine)
- Allen Parkway, a major street in Houston, Texas
- Allens Bay, Minnesota
Elsewhere
- Allen, Río Negro, Argentina, a city
- Allen Island, Queensland, Australia
- Allen Island (Nunavut), Canada
- Allen, Northern Samar, Philippines, a municipality
- Allen Rocks, Ross Island, Antarctica
- Allen (1913 Ohio automobile), an early American automobile
- Allen (1913 Philadelphia automobile), an early American automobile
- Allen Parkway, Houston, Texas, U.S.
- Allen Road, Toronto, Canada
- Allen station, a freeway-median light rail station in Los Angeles, California, U.S.
- Allen Street, Manhattan, New York, U.S.