San Ramon is a city located in Contra Costa County in the East Bay region of Northern California. With a population of over 83,000 residents, it is known for its suburban living, natural beauty, family-friendly neighborhoods, and robust economy. With roots dating back to the 19th century as a small agricultural town, today San Ramon has emerged into a vibrant and growing community.
ZIP codes are a system of postal codes used by the United States Postal Service to help efficiently route and deliver mail. Introduced in 1963, ZIP codes consist of 5 digits that designate specific geographic areas and neighborhoods. ZIP codes are instrumental in simplifying the mail system and ensuring reliable mail delivery to communities across the country.
In the case of San Ramon, ZIP codes allow the differentiation of mail routing between specific areas and neighborhoods within the city and surrounding region. Understanding San Ramon’s ZIP codes provides insight into the community makeup, geographical boundaries, and demographic details.
The Primary San Ramon ZIP Code
The main ZIP code for San Ramon is 94583. According to source, 94583 covers the central and southern parts of San Ramon, including major neighborhoods and landmarks such as Bollinger Canyon and Bishop Ranch.
As of 2022, there were approximately 39,284 people living within ZIP code 94583 according to source. This makes 94583 the most populated ZIP code in the city.
94583 can be considered the primary ZIP code for San Ramon since it covers the main residential and commercial areas of the city. Most businesses and government services use 94583 when referring to San Ramon as a whole.
Areas Covered by 94583
The 94583 ZIP code covers a large portion of central and southern San Ramon. This includes many neighborhoods and communities such as:
- Alcosta
- Bollinger Canyon
- Crow Canyon
- Fostoria Way
- Iron Horse
- Northgate
- The Preserve
- Ranch
- San Ramon Village
- Southwest San Ramon
- Trassina
- Windemere
94583 spans most of central and southern San Ramon south of Interstate 680. It covers many established residential communities, new housing developments, shopping centers, schools, parks and recreation areas.
Additional San Ramon ZIP Codes
While 94583 is the primary ZIP code for San Ramon, there are portions of the city that use some additional ZIP codes:1
94582 – This ZIP code is used for PO boxes and some residential areas in far eastern San Ramon near the border with Danville.2
94517 – A small part of northwestern San Ramon uses this Danville ZIP code.3
94556 – This Dublin ZIP code covers a tiny portion of southwest San Ramon near the I-680 corridor.1
So while 94583 covers most of the city, these additional ZIP codes are also used in various outskirts and neighborhoods of San Ramon.
ZIP Code Boundaries
The 94583 ZIP code covers an area within the city limits of San Ramon, California. It is bounded by the following city and county lines:
To the north, the 94583 ZIP code is bordered by the city of Danville and unincorporated areas of Contra Costa County.
The eastern edge aligns with the Alameda County border, separating San Ramon from the city of Pleasanton.
The southern boundary follows Bollinger Canyon Road and Annabel Lane, marking the edge of the 94582 ZIP code area within San Ramon.
On the western side, the 94583 ZIP code extends to the county line between Contra Costa and Alameda Counties.
So in summary, the 94583 ZIP code falls entirely within Contra Costa County and the city of San Ramon. Its borders are defined by the county lines and city boundaries on all four sides.
ZIP Code History
The 94583 ZIP code covering central San Ramon was established in the 1980s. According to the Wikipedia article on San Ramon, the city currently has two ZIP codes – 94582 and 94583. The 94583 ZIP code corresponds to central San Ramon and was likely introduced in the 1980s to handle the city’s rapid growth at that time.
San Ramon experienced significant residential and commercial development starting in the 1970s and continuing through the 1980s. The population grew from around 4,500 in 1970 to over 43,000 by 1990. This expanding suburban community needed additional ZIP codes to manage the growing volume of mail and parcel deliveries.
Prior to 1980, it appears San Ramon was covered primarily by the 94582 ZIP code which still covers areas to the south and west of central San Ramon. The US Postal Service likely decided to split off the 94583 ZIP code in the early 1980s to provide more specific mail routing as San Ramon expanded to the east.
ZIP Codes for PO Boxes
In San Ramon, PO boxes primarily use the 94583 ZIP code. However, some PO boxes may use 94582 as well. According to Post Office – SAN RAMON, the main post office that handles PO box services is located at 12935 Alcosta Blvd, San Ramon, CA 94583. This indicates that most PO boxes will use the 94583 ZIP code.
Specifically, the ZIP+4 designation for PO boxes in San Ramon is 94583-0001, according to PO BOX 1 (From 1 To 16), SAN RAMON, CA 94583-0001, USA. The “0001” indicates it is a PO box range. So in summary, 94583 is the primary ZIP code used for PO boxes in San Ramon.
Demographics
The 94583 ZIP code covers a population of approximately 39,000 people according to census data. The racial makeup of the 94583 ZIP code is predominantly White (45.7%) followed by Asian (36.0%) and Hispanic (10.5%) according to 2022 estimates from California-Demographics.com (source).
The median household income for the 94583 ZIP code is $125,074, significantly higher than the median income for California overall which is $80,440 according to data from City-Data.com (source). Nearly 70% of households in the 94583 ZIP code earn over $100,000 annually. Just 0.8% of households in the 94583 ZIP code live below the poverty line.
Other demographic statistics for the 94583 ZIP code:
- 52.2% male, 47.8% female
- Median age is 41.8 years old
- 18.5% of population is under 18 years old
- 13.5% of population is over 65 years old
Real Estate
The San Ramon 94583 ZIP code has seen significant growth in home prices and values over the past several years. According to Redfin, in December 2023 the median home price in San Ramon was $1.4 million, down 3.5% compared to the previous year. However, over a longer timeframe, prices have increased substantially. Zillow estimates the average San Ramon home value at $1,540,866, up 3.1% over the past year.
The Rocket Homes housing report shows a similar trend, with the median home selling price in San Ramon at $1.5 million in December 2023, down 9.1% from the year before. However, prices remain high compared to historical norms in the area.
The San Ramon real estate market is driven by the area’s desirability, high incomes, and proximity to major employment centers like San Francisco and Silicon Valley. Demand remains strong, especially for single family homes, keeping upward pressure on prices. Going forward, some analysts predict slower price growth as higher mortgage rates and economic uncertainty take effect.
Conclusion
In summary, the main ZIP code for San Ramon is 94583. This ZIP code encompasses the central and western parts of San Ramon, including neighborhoods like Alamo Creek and Gale Ranch. 94583 covers many of the key landmarks in the city such as the San Ramon Regional Medical Center, City Center Bishop Ranch, and various tech company campuses.
While 94583 is the primary ZIP code, San Ramon does have additional ZIP codes like 94582 which cover Danville and unincorporated areas to the east. The various San Ramon ZIP codes have seen rapid development and population growth in recent decades. Today, the 94583 area has expensive real estate and boasts high median incomes. The demographics reflect an educated population with many families. For companies and homebuyers interested in San Ramon, the 94583 ZIP code provides an attractive location in the East Bay region.