Newcastle
- Akhaltsikhe
- Apex Legends
- Athlon 64
- Borough of Newcastle-under-Lyme
- Castelnau (disambiguation)
- Castelnuovo (disambiguation)
- Châteauneuf (disambiguation)
- City of Newcastle
- Clonfad (civil parish)
- County of Newcastle
- Division of Newcastle
- Duke of Newcastle
- Electoral district of Newcastle
- Electoral district of Newcastle (South Australia)
- HMAS Newcastle (FFG 06)
- HMS Newcastle
- Herceg Novi
- Jaunpils
- Kaštel Novi
- Kilcleagh, (civil parish)
- Kota Bharu
- Lickbla (civil parish)
- Neuburg (disambiguation)
- Neuchâtel (disambiguation)
- Neufchâtel (disambiguation)
- New Cassel, New York
- New Cassel, Wisconsin
- New Castle Airport
- New Castle Correctional Facility
- New Castle County, Delaware
- New Castle District
- New Castle Hundred
- New Castle Northwest, Pennsylvania
- New Castle Township, Pennsylvania
- New Castle, Alabama
- New Castle, Colorado
- New Castle, Delaware
- New Castle, Indiana
- New Castle, Kentucky
- New Castle, New Hampshire
- New Castle, New York
- New Castle, Ohio
- New Castle, Pennsylvania
- New Castle, Virginia
- New Palace (Stuttgart)
- Newcastle (CDP), Maine
- Newcastle (The Architecture the Railways Built)
- Newcastle (clipper)
- Newcastle (electoral district)
- Newcastle (film)
- Newcastle Airport (disambiguation)
- Newcastle Building Society
- Newcastle Castle, Bridgend
- Newcastle District
- Newcastle Eagles
- Newcastle Emlyn
- Newcastle Falcons
- Newcastle International Airport
- Newcastle Jets FC
- Newcastle Knights
- Newcastle Local Municipality
- Newcastle Parish, New Brunswick
- Newcastle Publishing Company
- Newcastle Thunder
- Newcastle Township, Coshocton County, Ohio
- Newcastle Township, Dixon County, Nebraska
- Newcastle United F.C.
- Newcastle Waters
- Newcastle West
- Newcastle West, New South Wales
- Newcastle railway line, New South Wales
- Newcastle upon Tyne
- Newcastle, Alberta
- Newcastle, Bridgend
- Newcastle, California
- Newcastle, County Down
- Newcastle, County Dublin
- Newcastle, County Tipperary
- Newcastle, County Wicklow
- Newcastle, Jamaica
- Newcastle, KwaZulu-Natal
- Newcastle, Maine
- Newcastle, Monmouthshire
- Newcastle, Nebraska
- Newcastle, New Brunswick
- Newcastle, New South Wales
- Newcastle, Ohio
- Newcastle, Oklahoma
- Newcastle, Ontario
- Newcastle, Saint Kitts and Nevis
- Newcastle, Shropshire
- Newcastle, Texas
- Newcastle, Utah
- Newcastle, Washington
- Newcastle, Wyoming
- Newcastle-under-Lyme
- Newcastle-under-Lyme (UK Parliament constituency)
- Newcastle-under-Lyme Rural District
- Newcastle-upon-Tyne (UK Parliament constituency)
- Newport, Wales
- Nové Zámky
- Nowy Zamek
- Nyborg
- Qaleh Now (disambiguation)
- Shinshiro
- South New Castle, Pennsylvania
- Tazeh Qaleh (disambiguation)
- Toodyay, Western Australia
- Webster City, Iowa