Zip Code 95658 — Newcastle, CA

ZIP Code 95658 is associated with Newcastle, CA, in Placer County. The listed population estimate is 5,894; estimated density is 97.7 people per square mile. Among records with population estimates, it ranks #13 of 30 in Placer County and #1103 of 1,762 in CA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (38.879380, -121.151730)

Data MetricLocal Statistic
Postal / Zip Code95658
Primary CityNewcastle
State / ProvinceCA
CountyPlacer
Total Population5,894
Population Density97.7 people/sq mi
TimezoneAmerica/Los_Angeles

How 95658 Compares

MetricZIP 95658Placer County recordsCA records
Population estimate5,894422,749 (sum)39,286,245 (sum)
Population Density97.7 /sq mi----
County population rank#13 of 30----
State population rank#1103 of 1,762----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CA

ZIP CodeCityDistancePopulation estimate
ZIP 95663Penryn2.2 mi3,090
ZIP 95604Auburn3.6 mi27
ZIP 95603Auburn4.2 mi28,432
ZIP 95650Loomis4.6 mi13,405
ZIP 95677Rocklin7.3 mi29,206

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →