Stein and vice presidential candidate Cheri Honkala (HAHN'-kah-lah) are charged with defiant trespass and conspiracy for a sit-in at a bank.
They were among five people arrested at the demonstration Wednesday against housing foreclosures.
Attorney Lawrence Krasner says Stein and Honkala spent the night in jail and were released without bail Thursday afternoon. Honkala is a longtime Philadelphia activist.
Krasner says their first court appearance is scheduled for Sept. 4.