The King Family is one of the oldest families in Avonlea, residing at King Farm for many generations. Hetty, Alec, Roger, Ruth and Olivia are the five children of Heziah King.

Alec married Janet Ward in 1888 and had 4 children, Felicity, Felix, Cecily and Daniel who they raise on King Farm which has been left to Alec by his father.

Hetty King, the eldest of the Kings is unmarried and lives at Rose Cottage and works as a teacher, but later in life she decided to follow her passion and become a writer.

Ruth King is the deceased mother of Sara Stanley; she died of tuberculosis while Sara was still a toddler.

Roger King is a world renowned geologist and the 3rd King sibling. He is the father of Andrew King, who stayed in Avonlea for a brief period; Roger came to retrieve his son. Roger and Andrew left for Nova Scotia after Roger took a teaching position at Dalhousie University.

Olivia, the youngest of the King siblings is still often treated as the baby. Hetty often became overbearing, much to Olivia's annoyance. She works as Journalist at The Avonlea Chronicle where she met her husband, photographer Jasper Dale. The King family is the primary focus of the show, with each member usually serving as the protagonist for an episode.