The history of Pomona, California, is often introduced through orange groves and handsome old buildings. Both matter, but neither tells the whole story. The city’s past also includes Indigenous homelands, colonial change, ranching, railroad development, labor, neighborhood life, wartime incarceration, and decisions about what to preserve. Following these connected histories makes familiar streets more understandable. It also challenges the idea that local history is simply a sequence of prosperous beginnings and picturesque landmarks.
The valley’s history begins before the city
Cal Poly Pomona’s overview of early regional history identifies Tongva, also called Gabrielino, and Serrano peoples in the Pomona Valley before European colonization. Their history is foundational, not a brief preface to the arrival of settlers. The founding of Mission San Gabriel in 1771 brought lasting colonial changes to the region’s communities, labor, and land relationships.
A responsible account should avoid presenting Indigenous people only in the past tense. It should also distinguish the modern city boundary from older territories and relationships that did not follow municipal lines. Learning a place’s history begins by recognizing that the landscape held meaning before it acquired the names found on today’s road signs.
Rancho San José and the changing organization of land
In 1837, Governor Juan Alvarado granted Rancho San José to Ygnacio Palomares and Ricardo Vejar, according to the Historical Society of Pomona Valley’s Casa Primera history. The rancho provides a vital connection between regional landholding and places that survive in Pomona’s historical landscape. Its history also includes Indigenous labor, which should remain visible alongside the names of landowners.
Surviving adobe buildings can make this period feel tangible, but a house is only one part of a working landscape. Ask how water, livestock, roads, labor, and household activity connected the building to its surroundings. Those questions help turn a landmark visit into an investigation of a wider social and economic system.
Spadra, railroads, and a new town
The city’s General Plan places railroad development within the shift from Spadra toward the emerging Pomona townsite in the 1870s. Transportation changed which locations could attract trade, investment, and settlement. Read The Story of Spadra for a closer look at that earlier community and its relationship to the city that followed.
Citrus connected the landscape to a wider economy
Cal Poly Pomona’s citrus history guide describes the industry’s development alongside regional settlement and transportation. Groves were productive landscapes shaped by investment and work. Their place in local history becomes clearer when oranges are followed beyond the trees: into irrigation systems, packing operations, transportation, sales, and the households supported by agricultural employment.
This broader view changes the questions worth asking. Who controlled access to land and water? Who performed seasonal and year-round tasks? What records preserve workers’ experiences, and whose voices are missing? Promotional images can reveal how a region wanted to be seen, while payrolls, family accounts, and institutional records may illuminate different experiences. Our article Beyond the Orange Groves continues that wider inquiry.
A name, incorporation, and connections
According to Cal Poly Pomona’s Pomona historical overview, Solomon Gates proposed the name Pomona in an 1875 naming contest, invoking the Roman goddess associated with fruit. The city incorporated on January 6, 1888. The same overview records a Pacific Electric connection in 1911. These dates mark changes in civic identity and transportation, while everyday city life developed through countless smaller decisions.
Agriculture also became a public spectacle
Fairplex’s institutional history traces the Los Angeles County Fair’s beginnings to 1922 and its agricultural and commercial purposes. The fair connected production with display: work performed across the region could be presented to a wider public. Its place in Pomona’s history invites questions about entertainment, education, business promotion, and the ways a city represents itself to visitors.
The fairgrounds also hold a history of incarceration
The same grounds served a radically different purpose during World War II. Densho’s account of the Pomona detention facility documents the confinement of Japanese Americans there from May 7 to August 24, 1942, before transfer to longer-term incarceration sites. This history belongs in any serious account of Pomona, alongside the fair’s celebrations and civic importance.
Read celebratory places through more than one experience
A single site can carry histories that do not fit one comfortable narrative. Preserving that complexity means identifying who experienced the place, under what conditions, and whose account survives. Recognizing wartime incarceration does not require replacing one simplified story with another. It requires allowing evidence about coercion, loss, and daily life to stand clearly within the city’s history.
Preservation made the past a public responsibility
As Pomona changed, residents and institutions worked to retain evidence of earlier periods. The Historical Society of Pomona Valley was founded in 1916. Its account of the Phillips Mansion records the society’s 1966 purchase to prevent demolition. Such efforts show that the landmarks available today are partly the result of deliberate choices, fundraising, and continued care.
Preservation also operates beyond individual monuments. California’s official Lincoln Park Historic District record dates its National Register listing to April 9, 2004. The city’s preservation program provides resources for Lincoln Park, Wilton Heights, and Hacienda Park. Neighborhoods make visible the relationships between houses, streets, landscapes, and everyday use.
Changing land uses require more than a nostalgic explanation
The Cal Poly Pomona overview also describes the postwar replacement of citrus acreage by development. That broad transition deserves investigation at the scale of individual streets. A former agricultural parcel might be examined through successive maps, photographs, and building records to understand what replaced it and when. The question is not simply whether the earlier landscape was attractive, but how changing uses affected the people connected to it.
Neighborhood change can be documented through homes and businesses as well as celebrated landmarks. Family photographs, school memories, storefront signs, and community organizations may reveal meanings that an architectural survey alone cannot supply. Bringing these sources together helps explain why preservation can concern an ordinary meeting place or a familiar block as much as an impressive mansion.
Keep the story open to further research
Preservation raises questions as well as answering them. Which buildings survive? Which communities are represented in collections? Can a neighborhood’s social history remain visible when its physical appearance changes? A complete account needs architectural evidence and the experiences of people who lived and worked beyond the best-known landmarks.
Use our Pomona timeline to connect major dates, then explore research resources to investigate a particular place or person. The city’s history becomes richer when a grove, a rail connection, a fairground, and an ordinary home are understood as parts of one changing landscape rather than isolated attractions.
Image note: All three images are AI-generated illustrations, not archival photographs or verified views of specific Pomona sites.