Roman Catholic Diocese of Allentown
Diocese of Allentown Diœcesis Alanpolitana | |
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Cathedral of St. Catharine of Siena in Allentown in August 2015 | |
Coat of Arms of the Diocese of Allentown | |
Flag | |
| Location | |
| Country | United States |
| Territory | Pennsylvania counties of Berks, Carbon, Lehigh, Northampton and Schuylkill, in the United States |
| Ecclesiastical province | Archdiocese of Philadelphia |
| Headquarters | 1515 Martin Luther King Jr Dr., Allentown, Pennsylvania, U.S. |
| Coordinates | 40°36′06″N 75°28′38″W / 40.60167°N 75.47722°W |
| Statistics | |
| Area | 2,773 sq mi (7,180 km2) |
Population
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| Parishes | 80 |
| Information | |
| Denomination | Catholic |
| Sui iuris church | Latin Church |
| Rite | Roman Rite |
| Established | January 28, 1961 |
| Cathedral | Cathedral of Saint Catharine of Siena |
| Patron saint | Mary, Mother of the Church |
| Secular priests | 210 |
| Current leadership | |
| Pope | Leo XIV |
| Bishop | Alfred A. Schlert |
| Metropolitan Archbishop | Nelson J. Perez |
| Map | |
Ecclesiastical jurisdiction of the Catholic Diocese of Allentown in eastern Pennsylvania | |
| Website | |
| allentowndiocese | |
The Diocese of Allentown (Latin: Diœcesis Alanpolitana) is a Latin Church ecclesiastical jurisdiction, or diocese, of the Catholic Church in the Lehigh Valley region of Pennsylvania in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Philadelphia.
The mother church of the Diocese of Allentown is the Cathedral Church of Saint Catharine of Siena in Allentown. As of 2025, the bishop of Allentown is Alfred A. Schlert.
The Diocese of Allentown covers Berks, Carbon, Lehigh, Northampton and Schuylkill counties. As of 2025, the diocese had a registered population of 205,000 served by 78 parishes.