Sitwell is a surname. Notable people with the surname include:

• A member of the Sitwell literary family:

  Edith Sitwell

• Osbert Sitwell

• Sacheverell Sitwell

• The Sitwell Baronets, holders of a hereditary baronetcy awarded by the British Crown

  Sir Sitwell Sitwell, 1st Baronet

• Sir George Sitwell, 2nd Baronet

• Sir Sitwell Reresby Sitwell, 3rd Baronet

• Sir George Reresby Sitwell, 4th Baronet

• Sir (Francis) Osbert Sitwell, 5th Baronet

• Sir Sacheverell Sitwell, 6th Baronet

• Sir Sacheverell Reresby Sitwell, 7th Baronet

• Sir George Reresby Sitwell, 8th Baronet

Fictional characters

• Jasper Sitwell, a comic book espionage agent in the Marvel Comics universe

• Stan Sitwell, a character from the Fox television comedy series Arrested Development