Newcastle, Utah

Newcastle, Utah
Post office in Newcastle
Location in Iron County and the state of Utah
Coordinates: 37°39′46″N 113°33′52″W / 37.66278°N 113.56444°W / 37.66278; -113.56444
CountryUnited States
StateUtah
CountyIron
Newcastle1910
Area
 • Total
4.0 sq mi (10.3 km2)
 • Land4.0 sq mi (10.3 km2)
 • Water0 sq mi (0.0 km2)
Elevation
5,259 ft (1,603 m)
Population
 (2020)
 • Total
330
 • Density83/sq mi (32/km2)
Time zoneUTC-7 (Mountain (MST))
 • Summer (DST)UTC-6 (MDT)
ZIP code
84756
Area code435
FIPS code49-54330
GNIS feature ID2629952

Newcastle (also New Castle) is an unincorporated community and census-designated place (CDP) in southwestern Iron County, Utah, United States. It lies along State Route 56, 30 miles (48 km) west of Cedar City. Newcastle has a post office with the ZIP code of 84756. The population was 330 at the 2020 census. Newcastle was founded in 1910 by citizens of the more isolated Pinto.

Newcastle is a small farming community which has a dairy, orchard, greenhouses producing house plants and tomatoes, and several fields. Crops produced include wheat, oats, alfalfa, corn and potatoes.