A diocesan priest is a Roman Catholic priest who commits himself to a certain geographical area, and is ordained into this service of God's people within a diocese

Diocese

A diocese is the district or see under the supervision of a bishop. It is divided into parishes.An archdiocese is more significant than a diocese. An archdiocese is presided over by an archbishop whose see may have or had importance due to size or historical significance...

. This includes serving the everyday needs of the people in parishes, but their activities are not limited to that of their parish. Diocesan priests may serve in a myriad of different capacities, these services include, but are not limited to, campus ministry, teaching, and chaplain work for hospitals or prisons. They are expected to address the needs of those that they serve.