Each county used to have their own game/wildlife commission, they also appointed their own game wardens.
California still has a system like that. Each county has a fish and wildlife commission which serves as an advisory commission to the state fish and wildlife commission. Per law, county fish and wildlife commissions can hire their own game wardens to work for the county although as far as I know none do. So basically you'd have the state fish and wildlife officers, and the county fish and wildlife officers. Counties are also authorized to operate their own fish hatcheries.