Terrigal is an electoral district of the Legislative Assembly in the Australian state of New South Wales.

Terrigal has never won by the Labor Party; however it became a marginal seat following the 2023 election.

Terrigal was created at the redistribution prior to the 2007 election and consisted of much of the district of Gosford, then held by Chris Hartcher for the Liberal Party, while Gosford absorbed most of the former district of Peats, then held by Marie Andrews for the Labor Party.

The Central Coast (particularly around Gosford and The Entrance) is typically a highly competitive region for both major parties on all three levels of politics.

On its current boundaries, Terrigal takes in the suburbs and towns of Avoca Beach, Bensville, Bouddi, Box Head, Copacabana, Davistown, Empire Bay, Erina, Erina Heights, Forresters Beach, Green Point, Holgate, Killcare, Killcare Heights, Kincumber, Kincumber South, MacMasters Beach, Matcham, North Avoca, Picketts Valley, Pretty Beach, Saratoga, Springfield, St Huberts Island, Terrigal, Wagstaffe, Wamberal, Yattalunga and parts of East Gosford and North Gosford.