Worcester may refer to:

• Worcester, England, a city and the county town of Worcestershire in England
  • Worcester (UK Parliament constituency), an area represented by a Member of Parliament
  • City of Worcester, a district of Worcestershire
• Worcester Park, London, England
• Worcestershire, a county in England

• Worcester, Massachusetts, the largest city with the name in the United States
  • Worcester County, Massachusetts
• Worcester, Missouri
• Worcester, New York, a town
  • Worcester (CDP), New York, within the town
• Worcester Township, Pennsylvania
• Worcester, Vermont
  • Worcester (CDP), Vermont, within the town
• Worcester, Wisconsin, a town
• Worcester (community), Wisconsin, an unincorporated community
• Worcester County, Maryland
• Barry, Illinois, formerly known as Worcester
• Marquette, Michigan, formerly known as New Worcester

• Worcester, Limpopo, South Africa
• Worcester, Western Cape, South Africa
• Worcester Summit, Antarctica

• Worcester, a GWR 3031 Class locomotive that was built for and run on the Great Western Railway between 1891 and 1915
• Union Station (Worcester, Massachusetts), called "Worcester" by the Massachusetts Bay Transportation Authority
• HMS Worcester, several ships of the British Royal Navy
• USS Worcester, several ships of the United States Navy
• Worcester, a 1785 launched British East Indiaman

• John of Worcester, English monk and chronicler
• Roger of Worcester, Bishop of Worcester
• Sylvester of Worcester, Bishop of Worcester
• Worcester (surname)

• Worcester Pearmain, an English apple cultivar
• Worcestershire sauce, often "Worcester sauce", a spicy condiment devised in Worcester, England, in the 19th c.

• Worcester Academy
• Worcester, Bosch Group, a British domestic heating company
• Worcester College (disambiguation)
• Royal Worcester, an English bone china and porcelain manufacturer

• Worcester v. Georgia, an 1832 U.S. Supreme Court Case
• Wooster (disambiguation)