Dorothy Thornhill, Baroness Thornhill, is a British politician, who was the first directly elected local mayors of Watford, Hertfordshire, England. She was the Liberal Democrats' first directly elected mayor, and was also the first female directly elected mayor in the United Kingdom. She served as Mayor of Watford from May 2002 until May 2018. She was nominated for a life peerage in August 2015.
- Occupation
- politician, school teacher
- Position held
- member of the House of Lords, Mayor of Watford
- Citizenship
- United Kingdom, Australia
- Born
- May 26, 1955
