The 98188 zip code in SeaTac, Washington, is classified as a "High Diversity" area as of 2022. No single racial group exceeds 40% of the population, with at least three groups having significant representation (over 10% each). The community's demographic composition is 30% White, 24% Black, 18% Asian, and 19% Hispanic, with smaller percentages of other racial groups. The median income in 2022 was $67,982.

Over the past decade, this zip code has undergone a significant transformation in its racial composition. In 2013, the area was categorized as having "Moderate Diversity" with a White plurality (42%). By 2016, the community had transitioned to a "High Diversity" classification, which it has maintained through 2022. Notable shifts include a steady decline in the White population from 42% in 2013 to 30% in 2022, an increase in the Black population from 19% to 24%, a gradual rise in the Asian population from 13% to 18%, and a fluctuating but overall increasing Hispanic population from 16% to 19%.

The demographic shifts have been accompanied by economic changes. The median income has shown an overall upward trend, rising from $57,430 in 2013 to $67,982 in 2022, an increase of about 18.4%. A significant jump in median income occurred between 2017 and 2018, from $60,157 to $69,225. The population has grown from 23,151 in 2013 to 26,119 in 2022, an increase of about 12.8%.