Eureka is a medium-sized coastal city (i.e. on the ocean, a bay, or inlet) located in the state of California. With a population of 26,129 people and ten associated neighborhoods, Eureka is the 274th largest community in California.

One interesting thing about the economy is that relatively large numbers of people worked from their home: 9.45% of the workforce. While this number may seem small overall, as a fraction of the total workforce this is high compared to the rest of the county. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

Eureka is also nautical, which means that parts of it are somewhat historic and touch the ocean or tidal bodies of water, such as inlets and bays. Such areas are often places that visitors and locals go for waterfront activities or taking in the scenery.

Compared to the rest of the country, citizens of Eureka spend much less time in their cars: on average, their commute to work is only 17.41 minutes. This also means that noise and pollution levels in the city are less than they would otherwise be.

The education level of Eureka citizens is substantially higher than the typical US community, as 29.95% of adults in Eureka have at least a bachelor's degree.

The per capita income in Eureka in 2022 was $33,270, which is lower middle income relative to California, and middle income relative to the rest of the US. This equates to an annual income of $133,080 for a family of four. However, Eureka contains both very wealthy and poor people as well.

Eureka is an extremely ethnically-diverse city. The people who call Eureka home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Eureka residents report their race to be White, followed by Asian. Eureka also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 14.30% of the city’s residents. Important ancestries of people in Eureka include German, English, Irish, Italian, and European.

The most common language spoken in Eureka is English. Other important languages spoken here include Spanish and Miao/Hmong.