St. Helena, California

St. Helena population, 2020 to 2024

St. Helena lost 166 residents from July 2020 to July 2024, a change of -3.1%. In the latest year it moved by -19. Among 429 California places of 5,000 or more, that growth ranks 331st; the median place changed by -1.1%. The median place of 5,000+ in California has 37,056 people, so St. Helena is 14% of it.

St. Helena covers 4.96 square miles of land and 0.13 of water, for 1,060 people per square mile of land. The median California place of 5,000+ has 3,725, so St. Helena is less dense than the typical town.

What county St. Helena is in

All of St. Helena's residents live in Napa County, which had 132,727 residents in 2024. St. Helena holds 4.0% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in St. Helena

1 ZIP Code Tabulation Area (ZCTA) overlaps St. Helena by at least 10% of the ZCTA's or the city's land: 94574. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where St. Helena is

The Census internal point of St. Helena is at 38.512800, -122.468100. Sacramento, the capital, is 52.8 miles E in a straight line. The nearest larger place is Santa Rosa, CA (177,524 people), 13.7 miles away.

Daylight in St. Helena

At 38.51° N, St. Helena gets about 14 h 52 min of daylight around the June solstice and 9 h 29 min around the December solstice, a swing of 5 h 23 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near St. Helena

The eight nearest incorporated places of 1,000+ in California, measured between internal points. The closest is Calistoga, 7.8 miles away, with 5,022 people.