Police say fould play was not involved and at least one news source is saying that he may have taken his own life.
When Fahter Joe did not appear for afternoon services, other went looking for him and found his body in the rectory.
Father Joe had reportedly told his parishoners last week that he was being reassigned from St. Lawrence.
The Diocese issued the following statement::
Father Joseph F. Moreno, Jr., sacramental minister of St. Lawrence Parish in Buffalo, died unexpectedly on Saturday, Oct. 13, 2012.
A native of Buffalo, Father Moreno was born on June 21, 1958. He was ordained to the priesthood on Apr. 25, 1986, at Holy Spirit Church in Buffalo by Bishop Edward D. Head.
In a statement, Bishop Richard J. Malone, bishop of Buffalo, said, "Father Joe was dedicated to the priesthood, especially when it came to serving others. His presence to the parishioners of St. Lawrence made him much beloved. May God grant him eternal rest."
Funeral arrangements will be announced at a later date.