Rio Dell, California

Rio Dell population, 2020 to 2024

Rio Dell lost 129 residents from July 2020 to July 2024, a change of -3.8%. In the latest year it moved by -53.

Rio Dell covers 2.48 square miles of land and 0.13 of water, for 1,314 people per square mile of land. The median California place of 5,000+ has 3,725, so Rio Dell is less dense than the typical town.

What county Rio Dell is in

All of Rio Dell's residents live in Humboldt County, which had 132,380 residents in 2024. Rio Dell holds 2.5% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Rio Dell

2 ZIP Code Tabulation Areas (ZCTAs) overlap Rio Dell by at least 10% of the ZCTA's or the city's land: 95540, 95562. 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 Rio Dell is

The Census internal point of Rio Dell is at 40.495600, -124.115200. Sacramento, the capital, is 192.5 miles SE in a straight line. The nearest larger place is Fortuna, CA (12,114 people), 6.5 miles away. The nearest city of 100,000 or more is Chico, CA, 131.6 miles away.

Daylight in Rio Dell

At 40.50° N, Rio Dell gets about 15 h 04 min of daylight around the June solstice and 9 h 17 min around the December solstice, a swing of 5 h 48 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Rio Dell

The eight nearest incorporated places of 1,000+ in California, measured between internal points. The closest is Fortuna, 6.5 miles away, with 12,114 people.