County
Napa County
This is the county layer. It is often the first stop for assessor, tax collector, recorder, court, social service, election, health, sheriff, and unincorporated-area services.
Starting point
Start with the county layer.
County offices are the usual first stop for records, taxes, courts, elections, public health, social services, sheriff services, and unincorporated-area routing.
Cities inside the county can still control city permits, local code, utilities, business licenses, and city-specific rules.
2025 population
132,949
Land area
751.976 sq mi
Water area
40.326 sq mi
Directory notes
Local layers to keep on the same page.
Property, taxes, and records
For assessed value, exemptions, ownership records, recording, and tax bills, county offices are usually the starting layer.
Unincorporated land
If an address is outside city limits, county planning, building, environmental health, fire, or public works may handle local permits and code work.
Courts, services, and alerts
Superior court, sheriff, elections, social services, emergency alerts, and health offices often start at the county level.
Practical notes
Office, map, permit, and paperwork notes for Napa County
Place note · Cars and driving · Reviewed July 5, 2026
Downtown Napa parking is easier with the map in hand
Downtown Napa has garages, public lots, street spaces, permit spaces, and an interactive parking map, so a visitor or worker can check the city parking page before circling the blocks.
Place note · Home and property · Reviewed July 4, 2026
Napa permits depend on whether the city is the right agency
Napa issues many city permits and licenses, but some permits belong with Napa County, the state, or another public agency, and building submittals do not use a city online portal.
Place note · Home and property · Reviewed July 4, 2026
Napa service requests can be tracked in My Service Center
Napa's My Service Center lets residents submit service requests, report issues, ask for city information, and choose whether to make an account for updates.
Place note · Home and property · Reviewed July 4, 2026
Napa utility questions usually start with water or recycling
Napa utility questions usually split between water billing, water service, recycling, and solid waste.
Almanac notes
Stories and local context near Napa County
Place note · History and culture
Napa's Opera House keeps old Main Street in view
The Napa Valley Opera House was built in 1879 and still helps show the older Main Street layer beneath Napa's modern food, wine, and riverfront scene.
Place note · History and culture
American Canyon has a wetlands edge at the bottom of Napa County
American Canyon's Wetlands and Napa River Bay Trail connect the city to marsh views, Napa River access, wildlife, the San Francisco Bay Trail, and Napa County's southern edge.
Place note · History and culture
Calistoga has hot springs, a geyser, and a name people remember
Calistoga's spa-town story runs through Wappo history, Sam Brannan's resort dream, a famous name mix-up, and Old Faithful Geyser.
Place note · History and culture
St. Helena has a literary stop tucked near Main Street
St. Helena's old valley-center role pairs with the Robert Louis Stevenson Museum, a small stop with a surprisingly deep collection.
Place note · History and culture
Yountville layers George Yount, wine history, and the Veterans Home
Yountville's small-town center sits inside a bigger story of Caymus Rancho, early Napa Valley grapes, rail service, stone winery buildings, and the Veterans Home.
Place note · History and culture
Bale Grist Mill shows Napa County before the tasting rooms
Bale Grist Mill State Historic Park near St. Helena keeps Napa County tied to grain, water power, early settlement, a big water wheel, and weekend milling demonstrations.
Place note · Outdoors
Oxbow Commons is Napa's riverfront park with room for the river
Oxbow Commons gives downtown Napa a riverfront park with trails, an amphitheater plaza, event use, and high-water access notes to check.