Oliver Cromwell (1599–1658) was an English military and political leader and later Lord Protector of the Commonwealth of England, Scotland and Ireland.

Cromwell may also refer to:

• Cromwell (name)

• Cromwell, New South Wales, Australia
• Cromwell, Nottinghamshire, England
• Cromwell, New Zealand

• Cromwell, Alabama
• Cromwell, Connecticut
• Cromwell, Indiana
• Cromwell, Iowa
• Cromwell, Kentucky
• Cromwell, Minnesota
• Cromwell, Oklahoma
• Cromwell, Washington
• Cromwell Township, Clay County, Minnesota
• Cromwell Township, Huntingdon County, Pennsylvania

• Cromwell (film), from 1970, starring Richard Harris
• Cromwell (play), by Victor Hugo
• Cromwell (tragedy), an 1820 verse tragedy by Honoré de Balzac

• USS Cromwell (DE-1014), United States Navy ocean escort ship
• NOAAS Townsend Cromwell (R 443), an American fisheries research ship

• Baron Cromwell, a peerage of England
• Cromwell (computing), replacement firmware for the Microsoft Xbox
• Cromwell College, a residential college of the University of Queensland in St Lucia, Queensland, Australia
• Cromwell Current, in the Pacific Ocean
• The Cromwell Las Vegas, a boutique hotel in Las Vegas, Nevada, US
• Cromwell tank, a series of British tanks from World War II

• Oliver Cromwell (disambiguation)
• Cromwellian (disambiguation)
• All pages with titles beginning with Cromwell
• All pages with titles containing Cromwell