The state government has released designs for its new $300 million, 30,000-seat stadium at Parramatta.

The government says the new stadium will have the steepest stands of any in Australia bringing the fans close to the field of play.

An artists's impression of the new 30,000-seat stadium. Credit:NSW Government

"Fans will be closer to the action than they are at Brisbane's Suncorp Stadium, or any other in the country," said NSW Premier Mike Baird.

Mr Baird described the project and other investments in new and old stadiums totalling $1.6 billion as "the biggest investment in sporting and entertainment infrastructure since the 2000 Olympics".