The Rev. Robert Timchak surrendered to state police on Monday. He was arraigned in Milford on 19 charges, including possessing child pornography and tampering with evidence.
Authorities say the Diocese of Scranton received an anonymous letter last year alleging that someone using Timchak's e-mail address had accessed child pornography.
Police who searched Timchak's computers say he attempted to delete pictures of nude or partially nude males.
Timchak was granted a leave of absence in April. His attorney, John Petorak, says the 43-year-old priest is staying at a counseling facility in Downingtown.