SeaTac is a medium-sized city located in the state of Washington. With a population of 30,525 people and six associated neighborhoods, SeaTac is the 42nd largest community in Washington.

Housing costs in SeaTac 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 Washington.

Also of interest is that SeaTac has more people living here who work in computers and math than 95% of the places in the US.

Telecommuters are a relatively large percentage of the workforce: 9.03% 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.

Although the majority of commuting trips in the city are by private automobile, SeaTac is somewhat unusual for a city of its size for having a substantial number of people who use public transportation. For a lot of people, the bus helps to get to and from their jobs every morning, which benefits everyone in the SeaTac area by reducing both traffic and air pollution.

In terms of college education, SeaTac is somewhat better educated than the 21.84% who have a 4-year degree or higher in the typical US community: 25.41% of adults 25 and older in the city have at least a bachelor's degree.

The per capita income in SeaTac in 2022 was $36,111, which is middle income relative to Washington, and upper middle income relative to the rest of the US. This equates to an annual income of $144,444 for a family of four. However, SeaTac contains both very wealthy and poor people as well.

SeaTac is an extremely ethnically-diverse city. The people who call SeaTac home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of SeaTac residents report their race to be White, followed by Black or African-American. SeaTac also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 21.10% of the city’s residents. Important ancestries of people in SeaTac include Ethiopian, German, Irish, Somalian, and English.

Foreign born people are also an important part of SeaTac's cultural character, accounting for 38.83% of the city’s population.

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