Mansfield Park is the third published novel by Jane Austen, first published in 1814 by Thomas Egerton. A second edition was published in 1816 by John Murray, still within Austen's lifetime. The novel did not receive any public reviews until 1821.

The novel tells the story of Fanny Price, starting when her overburdened, impoverished family sends her at age ten to live in the household of her wealthy aunt and uncle; it follows her development and concludes in early adulthood.

From the late 20th century onward, critical reception has been diverse and Mansfield Park is now considered Austen's most controversial novel. In recent decades, historical context and allusions have featured prominently in criticism as has a growing awareness of Austen's sophisticated psychological characterisations.

Two notable film versions of the novel were released: Frances O'Connor starring in the lead role in the 1999 version co-starring Jonny Lee Miller and followed by Billie Piper starring in the 2007 version for ITV1 co-starring Blake Ritson.

Frances "Fanny" Price, at age ten, is sent from her family home to live with her uncle and aunt in the country in Northamptonshire. It is a jolting change, from the elder sister of many, to the youngest at the estate of Sir Thomas Bertram, husband of her mother's older sister. Her cousin Edmund finds her alone one day and helps her. She wants to write to her older brother William. Edmund provides the writing materials, the first kindness to her in this new family. Her cousins are Tom Jr. (age 17), Edmund (16), Maria (13) and Julia (12). Her aunt, Lady Bertram, is kind to her, but her uncle frightens her (unintentionally) with his authoritative demeanour. Fanny's mother has another sister, Mrs Norris; the wife of the clergyman at the Mansfield parsonage. Mrs Norris and her husband have no children of their own, and she takes a 'great interest' in her nieces and nephews; Mrs Norris makes a strict distinction between her Bertram nieces and lowly Fanny. Sir Thomas helps the sons of the Price family find occupations when they are old enough. William joins the Navy as a midshipman not long after Fanny arrives at Mansfield Park. He visits them once after going to sea, and writes to his sister.