Sir William Agnew, 1st Baronet was an English politician and prominent art dealer who was said to have dominated the British market for 30 years. Thomas Agnew & Sons, his London art business in Mayfair, flourished as one of the leading art dealerships in London from 1860, still with the family until 2013 when sold and known as "Agnew's Gallery", or more informally "Agnew's". On being created baronet in 1895, he was described as "the greatest art publisher and dealer in England".
- Occupation
- art dealer, politician
- Position held
- member of the 23rd Parliament of the United Kingdom, member of the 22nd Parliament of the United Kingdom
- Citizenship
- United Kingdom of Great Britain and Ireland
