The outage in Athlone was first reported at 9 o'clock this morning.
Power has been restored to over 10,000 ESB customers in Westmeath.
An outage affecting 12,200 homes and businesses in Athlone was reported earlier this morning.
However, 1,750 customers are still without electricity.
ESB Networks says it's working on the fault and expects power to be restored at 4 o'clock this afternoon.
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