Jacqueline Isobel Dean (née Hay, born 13 May 1957) is a New Zealand politician. She was a member of parliament for the Waitaki electorate, where she represented the National Party.

Dean was born in Palmerston North. She has worked in several roles, including professional acting. She hosted Play School, a children's television programme. She has also acted on stage, been a radio announcer, and worked in the education sector.

Early in Dean's political career, she served on the Waitaki District Council, representing the Oamaru ward. She also unsuccessfully contested the mayoralty.

In the 2005 election, she was the National Party's successful candidate for the Otago seat, a traditional National stronghold which had unexpectedly been taken by the Labour Party's David Parker. For this election, Dean campaigned on water issues, saying in her maiden speech to parliament that she believed water to be the "single most important issue facing New Zealand today". Dean won Otago by a margin of 1,995 votes.

She was returned to Parliament in 2008 and 2011 for the geographically similar Waitaki electorate.

Dean was confirmed as Waitaki's representative in the 2014 election. During the 2014 election, Dean retained Waitaki by a margin of 16,668 votes.

During the 2017 New Zealand general election, Dean retained Waitaki by a margin of 12,816 votes.

In 2020, the Waitaki electorate returned Dean by a margin of 3,281 votes. Following the election, she was appointed an Assistant Speaker.