Single-use plastic shopping bags are to be banned in Western Australia, the state's government has announced.

Premier Mark McGowan said it would address plastic pollution which significantly harms marine wildlife and birds.

He added that it would come into effect next July "and the introduction of a container deposit scheme" would also target plastic drinks containers.

“This is a positive step to address plastic pollution across the state,” he said.

He added: “The community and the retail industry have already been working to reduce the consumption of single-use plastic bags for more than a decade. The number of plastic bags used every year continues to grow and therefore it's time for the State Government to act, in the absence of a national approach.

“There are alternatives to single-use plastics and we need to move beyond single-use items and promote sustainable futures for our children.”

South Australia, Tasmania, the Northern Territory and Australian Capital Territory already have the bans in place, while Queensland is also looking to bring in a ban next year.

Plastic bags make up a relatively small portion of solid waste and litter across the country but wildlife can inadvertently eat or become entangled in plastic bag waste.

Western Australi's ban has garnered widespread support across the local government sector in recent months and among major retailers which are some of the biggest suppliers of plastic shopping bags.

Major supermarkets Coles, Woolworths and IGA have indicated their intention to ban single-use plastic bags while some retailers - including Aldi and Bunnings - already support the ban by not offering single-use plastic bags to their customers.

A plastic bag tax was introduced in England in October 2015 and requires all employers with more than 250 staff to charge customers for disposable plastic bags,