Fanny Price is a young girl from a large and relatively poor family, who is taken from them at age 10 to be raised by her rich uncle and aunt, Sir Thomas, a baronet, and Lady Bertram, of Mansfield Park. She had previously lived with her own parents, Lieut. Price and his wife, Frances (Fanny), Lady Bertram's sister. She is the second child and eldest daughter, with seven siblings born after her. She has a firm attachment to her older brother, William, who at the age of 12 has followed his father into the navy. With so many mouths to feed on a limited income, Fanny's mother is grateful for the opportunity to send Fanny away to live with her fine relatives.

Emma Woodhouse, aged 20 at the start of the novel, is a young, beautiful, witty, and privileged woman in Regency England. She lives on the fictional estate of Hartfield in Surrey in the village of Highbury with her elderly widowed father, a hypochondriac who is excessively concerned for the health and safety of his loved ones. Emma's friend and only critic is the gentlemanly George Knightley, her neighbour from the adjacent estate of Donwell, and the brother of her elder sister Isabella's husband, John. As the novel opens, Emma has just attended the wedding of Miss Taylor, her best friend and former governess. Having introduced Miss Taylor to her future husband, Mr. Weston, Emma takes credit for their marriage, and decides that she rather likes matchmaking.