On a Sunday morning in the hills east of Los Angeles, the parking lot of a Presbyterian church off Gartel Drive fills with families in pressed shirts and Sunday dresses, the hymns inside switching between English and Korean from one service to the next. This is one face of the Koreans in Walnut, California, a community that arrived quietly, chose this town for its schools and its calm, and folded itself into a place better known for its walnut groves than its diaspora.
The Place
Walnut sits in the eastern San Gabriel Valley, roughly twenty-five miles east of downtown Los Angeles, a city of about nine square miles tucked between Diamond Bar, Rowland Heights, West Covina, and Pomona. It took its name from Rancho Los Nogales, a Mexican land grant, nogales being the Spanish word for walnut trees.
The town incorporated on January 19, 1959, when it was still mostly ranch land and citrus, a place of horse trails and low hills. For decades it stayed small and semi-rural, the kind of suburb people moved to for space and quiet rather than status.
That changed within a single generation. By the 2020 census Walnut had about 28,430 residents, and roughly two-thirds of them were Asian American, one of the highest shares of any incorporated city in Los Angeles County.
How It Became Korean
Walnut’s Asian transformation is one of the most dramatic in Southern California, and the numbers tell the story plainly. In 1980 the city was barely 10 percent Asian. By 1990 it had climbed to 36 percent, by 2000 to 55 percent, and by 2020 to roughly 67 percent, a shift documented in the city’s census record.
Within that wave, Koreans were never the largest group. The dominant ancestries here have long been Chinese and Taiwanese, with significant Filipino numbers as well. But Korean families became a steady, visible thread in the fabric, and to understand why, you have to look at what they were looking for.
The first arrivals, the 1980s
The Korean presence in greater Los Angeles exploded after the 1965 Immigration and Nationality Act removed the old national-origin quotas. The earliest and densest settlement was Koreatown, the dense district west of downtown that became the cultural capital of Korean America.
But Koreatown was a first stop, not a final one. As families established small businesses, dry cleaners, markets, garment shops, and saved, they began to look outward for the same things many immigrant families want: a house with a yard, a safe street, and above all, good schools for their children.
In the 1980s, some of that outward movement reached Walnut. The town was still affordable by Southern California standards, the lots were generous, and word was beginning to travel within Korean church and business networks that the local public schools were unusually strong.
The schools that drew them
If one institution explains the Korean and broader Asian arrival in Walnut, it is the Walnut Valley Unified School District. The district serves nearly all of Walnut plus the southern part of Diamond Bar, and it has been ranked for years among the strongest public school systems in Southern California.
The flagship is Walnut High School, which sits in the top tier of California public high schools by test performance. Around 80 percent of its students meet the state standard in reading and roughly 61 percent in mathematics, well above the California averages.
For Korean parents, many of whom carried a deep cultural conviction about education, that record was decisive. Buying a modest house inside the Walnut Valley district boundary meant access to schools that, in their reckoning, rivalled private academies, without the tuition. Families moved for a school zone the way an earlier generation had moved for a job.
From Koreatown to the eastern valley
The migration into Walnut was part of a wider eastward spread of Korean Los Angeles along the 60 and 10 freeways into the eastern San Gabriel Valley and beyond. The Korean middle class fanned out into a corridor of suburbs: the Koreans of neighbouring Diamond Bar, the Korean community of Rowland Heights, the Koreans of Chino Hills, and Fullerton’s Korean families, with Walnut among them.
Walnut became one node in that constellation rather than a self-contained enclave. Korean families here have always lived alongside, and intermarried into, a larger Chinese community of Walnut and a substantial Taiwanese presence, and much of their commercial and religious life is shared across city lines with neighbouring towns.
That is part of what makes the Walnut story distinct. This is not Koreatown with its dense blocks of Korean signage. It is a quieter, more dispersed kind of belonging, lived out in cul-de-sacs and school pickup lines and church fellowship halls.
Building institutions
What Korean families did establish, firmly, were churches. The Korean American Protestant church has long been the central social institution of the diaspora, and Walnut is no exception. Kwang Sung Presbyterian Church of Southern California on Gartel Drive is one of the Korean congregations rooted in the city itself.
For many families the church was the first community they joined, before the PTA, before the neighbours. It provided Korean-language services for the immigrant generation, English ministries for the children, Saturday language schools, holiday gatherings, and a network of mutual aid that softened the hard edges of starting over in a new country.
The Landmarks
Kwang Sung Presbyterian Church of Southern California, 555 Gartel Drive. One of the Korean congregations anchored within Walnut’s own city limits. Like many Korean American churches it serves as far more than a place of worship, hosting language classes, youth programmes, and the weekly gatherings that hold the immigrant community together.
Walnut High School, 400 Pierre Road. The single biggest reason many Korean families chose this town. Consistently ranked among California’s top public high schools, it is the institution parents quote to one another when they explain why they bought where they did.
Suzanne Middle School and Suzanne Park. The middle school and its adjoining park sit at the heart of family life in Walnut, and the park is the traditional home of the Walnut Family Festival each autumn, a fair of food booths, music, and rides that draws the whole multi-ethnic town together.
Mt. San Antonio College. The large community college on Walnut’s eastern edge near Pomona is a fixture of local life and the longtime host of the Mt. SAC Relays, one of the most storied track and field meets in the country. For many local students, including children of immigrants, it is a stepping stone toward the University of California system.
H Mart, 2825 South Diamond Bar Boulevard, Diamond Bar. Just over the city line, this Korean American supermarket is the practical centre of Korean grocery life for Walnut families. Its aisles of banchan, fresh tofu, and Korean produce, and the food court inside, draw a steady stream of Walnut residents who cross into Diamond Bar to shop.
Han Nam Chain, 2108 Golden Springs Drive, Diamond Bar. Another Korean market in the neighbouring corridor that serves the wider eastern-valley Korean community, a reminder that for Walnut Koreans, the commercial heart of the diaspora often lies just across the boundary in Diamond Bar and Rowland Heights.
Lemon Creek Park and the William R. Rowland Adobe. The city built this park and restored a historic ranch house to preserve its older identity, the Walnut of citrus groves and cattle trails. It is a quiet counterpoint to the suburban present, and a place where newer residents come to learn the ground they now call home.
Where They Came From
The Korean families who settled in Walnut came, almost all of them, from the post-1965 immigration that reshaped Korean America. The first generation was overwhelmingly born in South Korea, often in Seoul or other large cities, and arrived with the education and ambition typical of that migration.
Many spent their first American years in or near Koreatown in central Los Angeles, building the small businesses that the community is known for, before moving east in search of houses and schools. Walnut, like its neighbours, drew the families who had found their footing and were ready to invest in the next generation.
By the 2020 census, roughly half of all Walnut residents were foreign-born, a figure that captures just how recent and immigrant-shaped the town’s transformation has been. For Korean households, that often meant a home where Korean was spoken to grandparents and English to teachers, the everyday bilingualism of the diaspora.
Walnut Today
Walnut today is a comfortable, leafy, overwhelmingly Asian American suburb that has kept its low-key character. There is no neon-lit Korean commercial strip within the city, no single block you could point to and call the Korean quarter. The community is woven in rather than concentrated.
For Korean groceries and restaurants, residents still drive a few minutes into Diamond Bar or Rowland Heights, where the markets and Korean barbecue houses cluster. Some locals have campaigned for a large Asian supermarket inside Walnut itself, a sign of a population that has outgrown its old retail footprint. The daily rhythms, though, remain centred on home, school, and church.
The honest picture is of a Korean community that is prosperous, educated, and somewhat dispersed, defined less by enclave than by aspiration. Its children move on to the University of California campuses and to careers across the country, and the question for the next generation, here as in every successful diaspora suburb, is how much of the language and the church life they will carry forward.
Frequently Asked Questions
How large is the Korean community in Walnut, California?
Walnut is about two-thirds Asian American out of roughly 28,000 residents, but Koreans are not the largest Asian group there; Chinese and Taiwanese families predominate. The Koreans in Walnut, California form a steady minority within that Asian majority rather than a dominant enclave.
Why did Korean families move to Walnut?
The biggest draw was the Walnut Valley Unified School District, long ranked among the strongest public school systems in Southern California. Korean families, who place strong cultural value on education, moved east from Koreatown for the schools, the safety, and the larger suburban homes.
Is there a Koreatown in Walnut?
No. Unlike Koreatown in central Los Angeles, Walnut has no dense Korean commercial district. The Koreans in Walnut, California live dispersed among a larger Chinese and Taiwanese population and travel to neighbouring Diamond Bar and Rowland Heights for Korean groceries and restaurants.
Where do Walnut’s Korean residents shop for Korean food?
Most cross into Diamond Bar and Rowland Heights, where Korean markets such as H Mart on Diamond Bar Boulevard and Han Nam Chain on Golden Springs Drive are located, along with a cluster of Korean restaurants serving the eastern San Gabriel Valley.
What Korean churches serve Walnut?
Korean Protestant churches are central to the community. Kwang Sung Presbyterian Church of Southern California on Gartel Drive is one Korean congregation within Walnut itself, and additional Korean churches serve the surrounding Diamond Bar and Rowland Heights corridor.
How is Walnut different from Diamond Bar and Rowland Heights?
The three towns share a Korean and broader Asian population and a single shopping corridor, but Walnut is smaller and more residential, with its commercial Korean life concentrated mostly in its neighbours. Diamond Bar and Rowland Heights hold more of the markets and restaurants, while Walnut offers the school district and the quiet streets.
If your family’s story passed through Walnut, or any of the places Koreans have made home in America, Atlas of Home can trace that journey. From the post-1965 departure out of Seoul, to a first apartment in Koreatown, to a house inside the Walnut Valley school zone, to wherever you are now.