Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/CA/NEWCASTLE

Newcastle ZIP code, California

The ZIP code for Newcastle, CA is 95658, and its area codes are 530 and 837.

USPS city name
1 ZIP code
Population
1,585
Area codes
530, 837

NANPA lists no telephone rate centre for Newcastle itself, so these are the area codes of the nearest one, Auburn (4.9 miles). A town on an area-code boundary can differ from its neighbour.

Newcastle in numbers

About 1,585 people live in Newcastle, in 620 households. The median household income is $108,750 a year, 10% above the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $598,000 (19% below the California median), and median gross rent is $1,798 a month. The median age is 42.3; 27.7% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 20 minutes.

Population1,585Newcastle1,585
Households620Newcastle620
Median age42.3Newcastle42.3California37.9US 38.9
Median household income$108,750Newcastle$108,750California$99,122US $80,734
Median home value$598,000Newcastle$598,000California$734,700US $332,700
Median gross rent$1,798Newcastle$1,798California$2,036US $1,413
Bachelor's degree or higher27.7%Newcastle27.7%California37.1%US 35.7%
Mean commute20.3 minNewcastle20.3 minCalifornia28.7 minUS 26.4 min
Population density663 / sq miNewcastle663 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Newcastle CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Newcastle

ZIP codes with the USPS city name Newcastle
ZIP City Type Population Median income Median home
95658 Newcastle , CA Standard 5,894 $126,581 $837,700

Map of Newcastle ZIP codes

95658

The ZIP codes of Newcastle, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Newcastle

The nearest larger towns are Auburn (13,768 people, 3.6 mi), North Auburn (13,480 people, 5.2 mi) and Loomis (6,853 people, 5.2 mi).

Towns near Newcastle
TownPopulationDistance
Auburn 13,768 3.6 mi
North Auburn 13,480 5.2 mi
Loomis 6,853 5.2 mi
Rocklin 73,327 7.6 mi
Granite Bay 21,673 7.6 mi
Auburn Lake Trails 3,284 8.3 mi
Lincoln 52,956 8.7 mi
Meadow Vista 3,162 10.6 mi
Roseville 155,955 12.1 mi
Lake of the Pines 5,461 12.5 mi
Orangevale 35,958 13.2 mi
Folsom 83,916 13.8 mi
El Dorado Hills 51,026 13.9 mi
Citrus Heights 86,995 14.5 mi

More nearby: every ZIP code in Placer County · California ZIP codes

Cite this page

zipcodes.pro. “Newcastle, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/newcastle

Underlying data is public domain or openly licensed — sources, vintages and licences.