Newcastle | |
|---|---|
| Coordinates:38°52′20″N121°07′50″W / 38.87222°N 121.13056°W /38.87222; -121.13056 | |
| Country | |
| State | |
| County | |
| Area | |
• Total | 2.396 sq mi (6.206 km2) |
| • Land | 2.392 sq mi (6.195 km2) |
| • Water | 0.0042 sq mi (0.011 km2) 0.18% |
| Elevation | 797 ft (243 m) |
| Population | |
• Total | 1,321 |
| • Density | 552.3/sq mi (213.2/km2) |
| Time zone | UTC-8 (Pacific (PST)) |
| • Summer (DST) | UTC-7 (PDT) |
| ZIP Code | 95658 |
| Area codes | 916, 279 |
| GNIS feature ID | 2583089[2] |
Newcastle is anunincorporated community andcensus-designated place (CDP) inPlacer County,California.[2] Nestled in theSierra Nevada foothills, Newcastle is located 8 miles (12.9 km) northeast ofRocklin[4] and 31 miles northeast ofSacramento. Newcastle generally has moderate winters and warm summers.
The population of the CDP as of the 2020 U.S. Census is 1,321.[5]
Newcastle was founded in the 19th century. According to Transcontinental Railroad Landmarks the "Regular freight and passenger trains began operating over the first 31 miles of Central Pacific's line to Newcastle June 10, 1864, when political opposition and lack of money stopped further construction during that mild winter. Construction was resumed in April, 1865." The region is also in the vicinity of what was the cradle of "gold country", where in the mid-19th century a flurry of miners and gold prospectors searched for their fortune. During this time, however, the town of Newcastle was known more for its orchards rather than abundant gold mines.
The Newcastle post office opened in 1864.[4]
According to theUnited States Census Bureau, the CDP covers an area of 2.4 square miles (6.2 km2), 99.82% of it land, and 0.18% of it water.
| Census | Pop. | Note | %± |
|---|---|---|---|
| 2010 | 1,224 | — | |
| 2020 | 1,321 | 7.9% | |
| U.S. Decennial Census[6] 2000[7] 2010[8] | |||
Newcastle first appeared as acensus designated place in the2010 U.S. census.[8]

The2020 United States census reported that Newcastle had a population of 1,321. The population density was 552.3 inhabitants per square mile (213.2/km2). The racial makeup of Newcastle was 1,095 (82.9%)White, 8 (0.6%)African American, 6 (0.5%)Native American, 16 (1.2%)Asian, 0 (0.0%)Pacific Islander, 42 (3.2%) fromother races, and 154 (11.7%) from two or more races.Hispanic or Latino of any race were 121 persons (9.2%).[9]
The census reported that 1,317 people (99.7% of the population) lived in households, 4 (0.3%) lived in non-institutionalized group quarters, and no one was institutionalized.[9]
There were 565 households, out of which 122 (21.6%) had children under the age of 18 living in them, 269 (47.6%) were married-couple households, 24 (4.2%) werecohabiting couple households, 168 (29.7%) had a female householder with no partner present, and 104 (18.4%) had a male householder with no partner present. 182 households (32.2%) were one person, and 117 (20.7%) were one person aged 65 or older. The average household size was 2.33.[9] There were 353families (62.5% of all households).[10]
The age distribution was 250 people (18.9%) under the age of 18, 88 people (6.7%) aged 18 to 24, 258 people (19.5%) aged 25 to 44, 390 people (29.5%) aged 45 to 64, and 335 people (25.4%) who were 65 years of age or older. The median age was 50.3 years. For every 100 females, there were 87.1 males.[9]
There were 621 housing units at an average density of 259.6 units per square mile (100.2 units/km2), of which 565 (91.0%) were occupied. Of these, 466 (82.5%) were owner-occupied, and 99 (17.5%) were occupied by renters.[9]
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