Welwyn is a village and civil parish in Hertfordshire, England. The parish also includes the villages of Digswell and Oaklands. It is sometimes referred to as Old Welwyn or Welwyn Village, to distinguish it from the much newer and larger settlement of Welwyn Garden City, about a mile to the south.

Hertfordshire is a ceremonial county in the East of England and one of the home counties. It borders Bedfordshire to the north-west, Cambridgeshire to the north-east, Essex to the east, Greater London to the south and Buckinghamshire to the west. The largest settlement is Watford, and the county town is Hertford.