The NSW Minerals Council’s annual Expenditure Survey of its member companies, showed 28 participating mining companies had a significant impact on the region.

The survey says these companies directly injected $868.1m into the Central West during the 2017-18 financial year, including $539.2m in wages, to 4941 employees working in the region's mines.

The Orange local government area's share of the figures was a spending total of $185.8m, including $116.5m in wages to its 984 full-time workers.

By far the biggest spend was in the Mudgee-based Mid-Western council area, where the surveyed companies outlaid $282.9m, including $183.2m in wages.

During the 2017-18 financial year, $328.4m was spent by the mining sector on purchases in businesses across the region, with the survey revealing this output supported 1364 Central West businesses.

NSW Minerals Council chief executive officer Stephen Galilee said Newcrest Mining's Cadia Valley Operations mine was an example of the economic support offered by mining enterprises.

"Newcrest’s Cadia mine has provided a bedrock of economic stability to the township of Orange and surrounds," he said.

"This economic injection from mining has been essential for the communities of the Central West."

NSW Business Chamber western regional manager Vicki Seccombe said she was not surprised by the data, and that mining made a significant contribution to the Central West and the broader NSW economy every year.​