A majority of NSW voters say the controversial "lockout" laws in Sydney's centre should be extended across the state and three-quarters of young people support existing laws, an exclusive Fairfax poll has found.

Nearly 60 per cent of NSW voters support extending the 1.30am "lockout" and 3am last drinks in force across Kings Cross and parts of the CBD to the rest of the state, according to a Fairfax-commissioned ReachTEL poll of 1600 voters.

The findings come as the state government prepares to receive a review of the 2014 laws, which have this year continued to draw protests of up to 10,000 people and criticism they have neutered Sydney's night life. Most voters, and especially younger voters, say core elements, including a 1.30am lockout, should be retained.

Only one-quarter of voters are opposed to extending the lockouts statewide; the balance are undecided.