ZIP Code Guide
94301
Downtown and Old Palo Alto ZIP
University Avenue's civic spine: Palo Alto's historic downtown ZIP where faculty-era neighborhoods meet the commercial heart of the Peninsula
- Downtown Palo Alto
- Old Palo Alto
- Professorville
- Crescent Park edge
ZIP code 94301 covers the central and northeastern portions of incorporated Palo Alto within Santa Clara County — a postal area anchored by University Avenue downtown and encompassing some of the city's oldest residential neighborhoods. The code represents the civic and commercial core of a city whose identity is inseparable from Stanford University's adjacent presence.
Geographic Position
94301 extends from University Avenue downtown eastward through Old Palo Alto and Professorville toward the city's boundaries with Menlo Park and East Palo Alto. San Francisquito Creek forms the northern boundary with Menlo Park. Embarcadero Road and Oregon Expressway provide east-west connectivity through the postal area.
The ZIP occupies flat to gently rolling Peninsula terrain, with mature street trees and historic homes defining neighborhood character. Downtown Palo Alto's grid connects directly to the Caltrain station, establishing a transit-oriented commercial spine within the postal boundary. Stanford University's campus lies immediately adjacent to the south and west, though much of the university occupies unincorporated Santa Clara County land.
Neighborhood Character
Palo Alto incorporates as a city; Professor Hopkins lays out streets and sells lots to faculty and merchants, creating the neighborhood patterns visible in 94301 today.
William Hewlett and David Packard found Hewlett-Packard in a garage at 367 Addison Avenue within the broader Palo Alto area — a site recognized in Silicon Valley's startup origin narrative.
Postwar development fills remaining parcels; Old Palo Alto and Crescent Park neighborhoods mature as established residential addresses.
Downtown University Avenue undergoes sustained revitalization; infill housing near Caltrain adds density while historic neighborhoods receive preservation-focused planning attention.
Within 94301, University Avenue downtown anchors civic and commercial life with restaurants, bookstores, and the historic Stanford Theatre. Old Palo Alto and Professorville feature homes dating to the early 20th century on tree-lined streets. The neighborhood's development was closely tied to Stanford University's growth and the faculty housing market of the late 19th and early 20th centuries.
Economy & Employment
94301 supports a dense network of restaurants, boutiques, and professional offices along University Avenue and adjacent streets. Medical offices, law firms, and financial services firms line Emerson Street and Hamilton Avenue corridors. Venture capital offices along Sand Hill Road in adjacent areas influence the regional economy accessible from 94301 addresses.
Stanford University's faculty, staff, and spinoff companies contribute to the employment landscape, though the campus itself lies primarily outside incorporated Palo Alto. Many residents commute to technology firms, research institutions, and professional services throughout Silicon Valley and San Francisco. Caltrain connectivity supports Peninsula and San Francisco commuting patterns.
Market & Housing Context
According to U.S. Census Bureau data for ZIP Code Tabulation Area 94301, the area had a population of approximately 17,508 and 8,429 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 94301 includes historic single-family homes in Old Palo Alto and Professorville alongside multifamily buildings near downtown and the Caltrain station. The relatively balanced tenure split reflects both long-established owner-occupied neighborhoods and rental housing serving university-adjacent and professional populations. Structure types range from early 20th-century craftsman homes to contemporary infill development.
Living in 94301
University Avenue downtown draws residents and visitors for dining, shopping, and the Stanford Theatre's classic film screenings. The Palo Alto Farmers' Market operates on Saturdays near California Avenue in an adjacent ZIP. Rinconada Park and the Palo Alto Art Center provide recreation and cultural programming accessible from 94301 neighborhoods.
Palo Alto Unified School District serves public school students, operating campuses including Palo Alto High School and Addison Elementary School. Castilleja School and Sacred Heart Schools operate as private institutions in the city. School assignments vary by specific address within the ZIP.
Caltrain provides commuter rail at the downtown Palo Alto station. VTA bus routes serve University Avenue and Embarcadero Road corridors. The Marguerite shuttle connects Stanford campus to Palo Alto transit stations.
94301 Today
17,508
Population (2020 Census ZCTA)
8,429
Housing Units (2020 Census)
1894
Palo Alto Year Incorporated
Caltrain
Downtown Station
Government and Civic Life
94301 falls within the City of Palo Alto municipal boundaries and Santa Clara County. City Hall on Hamilton Avenue administers planning, public safety, and community services. The city council addresses land use, housing, and transportation policy affecting downtown and historic neighborhoods within the ZIP.
Academic and Cultural Environment
Stanford University's lectures, performances, and athletic events are open to the public from the adjacent campus. Cantor Arts Center and the Anderson Collection offer museum experiences near 94301 addresses. The Palo Alto Art Center and Junior Museum and Zoo provide cultural programming for residents.
Geography & Environment
94301 spans flat to gently rolling Peninsula terrain. San Francisquito Creek forms the northern boundary, and the Mediterranean climate supports coast live oaks and ornamental street trees throughout residential blocks. The Baylands Nature Preserve lies within reach to the northeast in adjacent postal areas.
Foothills Park, a city-owned open-space preserve, is accessible to Palo Alto residents from southwestern city ZIP codes rather than directly within 94301.
Transportation & Connectivity
94301 is a major Caltrain station city, with downtown rail service to San Francisco and San Jose. Highway 101 runs along the city's eastern edge, accessible from 94301 via Oregon Expressway and Embarcadero Road. VTA bus routes and bicycle infrastructure including protected lanes serve downtown corridors.
San Francisco International Airport is approximately twenty-five miles north via Highway 101.
Looking Forward
Palo Alto's housing element identifies downtown and transit-adjacent areas within 94301 for potential additional housing units. Council debates address the balance between preserving historic neighborhood character and meeting state housing mandates. Downtown and University Avenue continue to receive investment in pedestrian amenities and commercial vitality.
Climate adaptation planning focuses on creek management along San Francisquito Creek and regional sustainability goals affecting the broader city.
The ZIP's Character
94301 captures Palo Alto's civic and historic identity — a ZIP where University Avenue's commercial spine, Professorville's faculty-era homes, and Caltrain connectivity define daily life at the intersection of academic heritage and Peninsula commerce. From the HP garage era to Sand Hill Road's venture capital influence, the area's story reflects American innovation.
"94301 is Palo Alto's front door — University Avenue, Professorville's porch steps, and a Caltrain platform where the Peninsula's civic life meets the university town that Silicon Valley grew around."
From browsing University Avenue to walking Old Palo Alto's tree-lined blocks, 94301 offers the historic and commercial heart of Palo Alto within a single postal code. Buyers, sellers, and investors evaluating the area benefit from understanding its downtown proximity, historic housing stock, and balanced tenure patterns.

