WASHINGTON – Secretary of Labor Hilda L. Solis announced on Wednesday that she was stepping down, becoming the latest woman to leave President Obama’s cabinet at a time when his personnel choices are drawing scrutiny for their lack of female candidates.

Ms. Solis, a former congresswoman from California, told colleagues in an e-mail that she had submitted her resignation letter to Mr. Obama Wednesday afternoon.

She said she had decided to step down after consulting family members and friends. Associates of Ms. Solis, who is 55 and was born in Los Angeles, said she was likely to run for a seat on the Los Angeles County Board of Supervisors.

In a statement, Mr. Obama said, “Secretary Solis has been a critical member of my economic team as we have worked to recover from the worst economic downturn since the Great Depression and strengthen the economy for the middle class.”