707 Area Code: Santa Rosa, California

The 707 area code covers California's North Coast and the inland counties just north of San Francisco Bay, with Santa Rosa as the primary city. Santa Rosa sits in Sonoma County's wide central valley, surrounded by oak savanna, low coastal mountains, and the wineries that have shaped the broader region's identity over the past several decades. The 707 footprint stretches from the wine-country valleys north through the redwood forests of Mendocino and Humboldt counties up to the Oregon border, taking in some of the most dramatic coastal terrain in the country.

A long list of California cities — Anaheim, Bakersfield, Chico, Concord, and others — appears in the directory's records linked to 707 numbers. None of those sit inside the 707 footprint. Their recurrence reflects California's high number mobility through porting, prior registration, and address linkages that don't follow area-code lines. We currently track 558 distinct prefixes within 707 in detail, a working subset of the live prefix population.

The most striking demographic feature of Santa Rosa is its older skew: the city's median age sits comfortably above the US figure, partly a reflection of long-standing residents and partly the draw of the climate and the wine-country setting for incoming retirees. Median household income runs well above the national reading, home values come in roughly twice the US figure, and the city's population is in the high one-hundreds of thousands — large enough to anchor the broader North Bay economy.