Dubbo's neighbours are projected to have hundreds fewer people living within their boundaries by 2031.
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The NSW Department of Planning and Environment delivered the grim outlook for the Orana region in its most recent release of projection figures.
The population of the Warren Local Government Area (LGA) would plummet by 16.9 per cent by 2031, according to the department's projections.
It would lose 500 people, taking its ranks back to 2400 people.
Gilgandra LGA's population would fall by 11.4 per cent to 4000 people by 2031.
Like Gilgandra, the Narromine LGA would shed 500 people from its population, equating to a 7.6 per cent loss.
The population of the Wellington LGA was projected to fall by 750 people, or 8.4 per cent.
Losses of 5.1 per cent of the population - 150 people - face the Bogan LGA.
The same trio of factors were driving population change at Gilgandra, Narromine, Warren and Wellington, and included internal migration loss, high fertility rate and an ageing population.
In the Nyngan-based Bogan LGA there were two factors identified as driving population change - internal migration and the high fertility rate. While their populations decline in size, the Dubbo LGA was projected to increase by 15.6 per cent by 2031.