According to Duke Energy, the fallen tree limb damaged the company's equipment.
The outage is in the area of the Millbrook and Wakeview neighborhoods.
It was first reported around 11:20 a.m.
The North Raleigh Driver License office in the Spring Forest Pavilion Shopping Center was closed due to the outage.
Power is expected to be back on around 1:30 p.m.
More from Duke Energy here.