Public libraries in NSW will be able to expand their collections, carry out major upgrades and extend their services through a new $60 million investment, the state government will announce on Friday.

Arts Minister Don Harwin will make the announcement in Wagga Wagga, where the government is campaigning to win a byelection set down for next month.

All libraries across the state will benefit from the million-dollar funding boost. Credit:Wayne Taylor

The NSW Public Libraries Association and Local Government NSW had warned that insufficient funding was threatening the viability of 360 public libraries across the state.

The government had been criticised for cutting recurrent funding to libraries by 5 per cent in its recent budget.