None Spoken language(s) English (only) 72.6% Spanish 13.6% Others 13.8% [ 2 ] Demonym New Jerseyan, [ 3 ] New Jerseyite [ 4 ] Capital Trenton Largest city Newark Area   Ranked 47th in the U.S.  - Total 8,721 sq mi (22,608 km 2 )  - Width 70 miles (112 km)  - Length 170 miles (273 km)  - % water 14.9