ZIP Code Guide
94306
California Avenue and Midtown ZIP
The Caltrain corridor's second front door: Palo Alto's midtown ZIP where California Avenue commerce meets established residential blocks
- California Avenue
- Midtown
- Greendell
- Meadow Park area
ZIP code 94306 covers the central-western portion of incorporated Palo Alto within Santa Clara County — a postal area centered on the California Avenue business district and encompassing Midtown neighborhoods between downtown University Avenue and southern Barron Park. The code serves as Palo Alto's transit-oriented commercial corridor parallel to the downtown Caltrain station served by 94301.
Geographic Position
94306 extends from the California Avenue commercial district westward through Midtown residential neighborhoods toward the city's boundaries with Stanford lands and Los Altos. Alma Street and El Camino Real serve as major north- south arterials through the postal area. The California Avenue Caltrain station anchors the ZIP's eastern commercial edge.
Terrain within 94306 is predominantly flat Peninsula topography with mature street trees defining residential character. The ZIP sits on the Santa Clara Valley floor west of downtown Palo Alto, occupying a central tier of the city's incorporated footprint between the 94301 and 94303 postal areas.
Neighborhood Character
California Avenue develops as a secondary commercial spine parallel to University Avenue, serving railroad-era Palo Alto with shops and services within the present 94306 boundary.
Midtown and Greendell neighborhoods fill with postwar housing tracts; the California Avenue corridor matures as a neighborhood commercial district distinct from downtown.
California Avenue undergoes revitalization with streetscape improvements, new restaurants, and technology offices attracting regional visibility.
Housing infill near the Caltrain station adds density; Midtown neighborhoods receive infrastructure investment while maintaining established residential character.
Within 94306, California Avenue functions as a walkable commercial corridor with restaurants, cafes, and technology offices. Midtown neighborhoods feature single-family homes on tree-lined streets developed primarily in the mid-20th century. The Greendell area provides additional residential blocks with modest lot sizes typical of central Palo Alto development.
Economy & Employment
94306 supports commercial activity along California Avenue and El Camino Real corridors — restaurants, retail, professional offices, and technology firms occupy storefronts and office spaces throughout the district. The California Avenue Caltrain station supports commuting patterns to San Francisco and San Jose.
Residents work at employers throughout Silicon Valley and the Peninsula, including Stanford University, Stanford Hospital, technology campuses in Mountain View and Cupertino, and downtown Palo Alto professional services. Local businesses serve the residential population and Caltrain commuters throughout the California Avenue district.
Market & Housing Context
According to U.S. Census Bureau data for ZIP Code Tabulation Area 94306, the area had a population of approximately 27,183 and 11,744 housing units as of the 2020 Census. American Community Survey estimates for the 2019–2023 period indicate that roughly 53 percent of occupied housing units are owner-occupied and 47 percent are renter-occupied.
The housing stock within 94306 includes single-family detached homes in Midtown and Greendell alongside multifamily buildings near California Avenue and the Caltrain station. The relatively balanced tenure split reflects both established owner-occupied neighborhoods and rental housing serving transit- oriented and professional populations. Infill development near the Caltrain station has added contemporary multifamily units to the structure mix.
Living in 94306
The Palo Alto Farmers' Market operates on Saturdays near California Avenue, drawing residents from across the city. Meadow Park and Greer Park provide neighborhood recreation within the ZIP. The California Avenue streetscape supports walkable dining and shopping throughout the week.
Palo Alto Unified School District serves public school students, operating campuses including Jane Lathrop Stanford Middle School, Fairmeadow Elementary School, and Palo Alto High School. School assignments depend on specific address and district boundaries within the ZIP.
Caltrain provides commuter rail at the California Avenue station. VTA bus routes serve Alma Street, El Camino Real, and California Avenue corridors. Bicycle infrastructure including protected lanes on Bryant Street connects 94306 to regional cycling networks.
94306 Today
27,183
Population (2020 Census ZCTA)
11,744
Housing Units (2020 Census)
Caltrain
California Avenue Station
53/47
Owner/Renter Tenure Split (ACS 2019–2023)
Government and Civic Life
94306 falls within the City of Palo Alto municipal boundaries and Santa Clara County. The California Avenue Area Development Association supports businesses and community events in the commercial district. City services are administered from City Hall on Hamilton Avenue, with planning decisions affecting transit-oriented development near the Caltrain station.
Commercial Vitality
California Avenue's revitalization has attracted restaurants, technology offices, and specialty retail to a corridor that historically served as Palo Alto's secondary commercial spine. The district's walkability and Caltrain access contribute to its role as a neighborhood destination within the broader city.
Geography & Environment
94306 occupies flat Peninsula terrain on the Santa Clara Valley floor. The Mediterranean climate supports ornamental street trees and residential landscaping throughout Midtown blocks. Adobe Creek drains the southwestern portion of the ZIP toward the baylands beyond city limits.
Rinconada Park and the Palo Alto Art Center in adjacent areas provide cultural and recreational resources accessible from 94306 neighborhoods.
Transportation & Connectivity
94306 is a Caltrain station area, with California Avenue rail service to San Francisco and San Jose. El Camino Real and Alma Street provide major surface arterials. Highway 101 is accessible via Oregon Expressway in adjacent postal areas. The Marguerite shuttle connects Stanford campus to Palo Alto transit stations.
Protected bicycle lanes on Bryant Street and Alma Street corridor investments support cycling connectivity throughout the ZIP.
Looking Forward
Palo Alto's housing element identifies California Avenue and transit-adjacent areas within 94306 for potential additional housing units. Council debates address the balance between preserving Midtown neighborhood character and meeting state housing mandates near the Caltrain station. California Avenue streetscape improvements continue through city and business association investment.
Regional sustainability goals and bicycle infrastructure planning affect transportation connectivity throughout the ZIP.
The ZIP's Character
94306 embodies Palo Alto's dual commercial identity — a ZIP where California Avenue's neighborhood-scale commerce complements University Avenue's downtown vitality, and where Midtown's residential streets house generations of Peninsula residents. The Caltrain corridor ties the area to San Francisco and San Jose while local shops and parks anchor daily neighborhood life.
"94306 is Palo Alto's Caltrain neighborhood — California Avenue's cafe row, Midtown's porch-lined streets, and a rail platform that connects Peninsula residential life to the Bay Area's employment centers."
From the Saturday farmers market to Caltrain commutes, 94306 offers a transit- oriented slice of Palo Alto within a single postal code. Buyers, sellers, and investors evaluating the area benefit from understanding its California Avenue commercial context, balanced tenure patterns, and Midtown housing character.

