California note
Hillsborough's quiet streets come from an old estate-town choice
Hillsborough incorporated in 1910, then kept a spacious estate-town feel through large lots, winding roads, and careful residential zoning.
Hillsborough feels different from many Peninsula towns because it made a clear choice early on. Residents voted to incorporate in 1910, when the town had only 89 registered voters and about 750 people.
The early town was known for large estates. Between 1910 and 1938, the population grew, and some of those big properties were divided into smaller lots. Even then, many original houses stayed on several acres, so the town kept a spread-out feel.
That pattern still shapes daily life. Hillsborough does not have a busy downtown strip in the way nearby Burlingame or San Mateo does. Its identity is more residential: trees, gates, curved roads, schools, and quiet hills.
One detail explains a lot. In 1953, the town set a one-half-acre minimum lot size, and that basic idea still helps protect the low-density feel. Hillsborough is a town built around privacy, space, and a long-running promise to stay mostly residential.
Where to see it
El Camino Real entrances, Ralston Avenue, Eucalyptus Avenue, and Hillsborough's residential hills.
Sources
Sources for this story
Reviewed July 2, 2026
Public sources for the places, events, and details above.
Connected places
Open the local directory
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