Jessica Aber, the former US attorney for the Eastern District of Virginia, was found dead at a residence on Saturday morning.
Police in Alexandria, Virginia, responded to reports of an unresponsive woman at about 09:18 local time (13:00 GMT) , the department said in a statement.
Officers then located a deceased woman, who they later identified as Ms Aber, police said.
Ms Aber, 43, was appointed by former President Joe Biden in 2021. She stepped down in January when Donald Trump took office.