Chartwell Mansion, French chateau style mansion in Bel Air, Los Angeles, US.

Chartwell Mansion is a Chateauesque mansion in Bel-Air, Los Angeles, designed by Sumner Spaulding in 1933. Its pale stone facade sits behind a tall black wrought-iron gate flanked by square piers topped with carved animal figures and black lanterns. A central two-storey block with a low-pitched roof and small dormer is joined by symmetrical wings with tall rectangular windows, and a balustraded balcony projects above the entrance.

Architect Sumner Spaulding designed the property in 1933 on behalf of engineer Lynn Atkinson. The building remained unoccupied at first because Atkinson's wife rejected the property.

The mansion is best known as the Clampett family home in the 1960s sitcom The Beverly Hillbillies. The house was never open to the public; the facade and gate were seen on screen, and the property remains a private residence in Bel-Air.

The estate covers about 10 acres (4 hectares) in Bel-Air, with gardens by François Goffinet that include cascades, ponds, a grove, a tennis court, swimming pools and pavilions. After buying the neighbouring former Reagan property on St. Cloud Road, Jerry Perenchio had that house demolished and added the site to Chartwell.

Lachlan Murdoch acquired the property in 2019 for a sum of 150 million dollars. This sale set a record for the highest price of a residential property in California.