There is a website, Aneroid Energy (https://anero.id/energy/fossil-energy), visualising all kinds of power plants in Australia and their corresponding hourly dispatches.
For example, their precise locations, capacities and current states:
and detailed time series regarding power generations:
More data is provided by Australian Energy Market Operator (AEMO)...
I believe the closest you can get is a monthly average retail price. The Energy Information Agency provides a monthly report on average retail price of electricity by state (note that EIA has an API if you want to access this data programmatically):
As mentioned in the comments, it's unlikely that any significant amount of residential customers in ...
This is the source I use for electric utility service territories:
It is through the US dept of Homeland Security. I can't promise that it is perfect, but this type of geographic info is hard to come by