Seaside 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 31,478 people and nine associated neighborhoods, Seaside is the 243rd largest community in California.

Housing costs in Seaside are among some of the highest in the nation, although real estate prices here don't compare to real estate prices in the most expensive communities in California.

Seaside is home to a number of people employed in the armed forces. When you visit or walk around Seaside, some of the people you will bump into will be military people In and out of uniform, jogging, shopping and generally out and about town.

Telecommuters are a relatively large percentage of the workforce: 7.89% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. 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.

Seaside is also a college town, where lots of students live while attending area colleges. Because of the high percentage of people living in Seaside enrolled in college, Seaside has a number of services, amenities and opportunities geared towards the needs and activities of students.

One of the nice things about Seaside is that it is nautical, which means that parts of it are somewhat historic and touch the ocean or tidal bodies of water, such as inlets and bays. Because of this, visitors and locals will often go to these areas to take in the scenery or to enjoy waterfront activities.

The citizens of Seaside are slightly better educated than the national average of 21.84% for all cities and towns, with 24.86% of adults in Seaside having a bachelor's degree or advanced degree.

The per capita income in Seaside in 2022 was $33,366, 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 $133,464 for a family of four. However, Seaside contains both very wealthy and poor people as well.

Seaside is an extremely ethnically-diverse city. The people who call Seaside home describe themselves as belonging to a variety of racial and ethnic groups. People of Hispanic or Latino origin are the most prevalent group in Seaside, accounting for 44.60% of the city’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of Seaside residents report their race to be White, followed by Asian. Important ancestries of people in Seaside include German, English, Irish, Italian, and French.

Seaside also has a high percentage of its population that was born in another country: 26.18%.

The most common language spoken in Seaside is English. Other important languages spoken here include Spanish and Tagalog.