Commonwealth Electoral Division of: Mackellar (New South Wales)
- Division name: Mackellar
- State: New South Wales
- Name derivation: Named after Dorothea Mackellar (1885-1968), a famous Australian poet and novelist.
- Size & Location description: Mackellar covers an area of approximately 233 sq km from the northern part of Palm Beach, south to Dee Why and west to Duffys Forest. The main suburbs include Avalon, Bayview, Belrose, Bilgola, Church Point, Collaroy, Cromer, Davidson, Elanora, Mona Vale, Narrabeen, Newport, Palm Beach, Scotland Island, Terrey Hills, Warriewood and parts of Beacon Hill, Dee Why, Narraweena and Frenchs Forest and Forestville.
- Products/industries of the area: Light manufacturing, service industries, commercial wholesale and retail trades and tourism.
- First proclaimed/election: 1949