Castle Rock is a very small city located in the state of Washington. With a population of 2,445 people and two associated neighborhoods, Castle Rock is the 200th largest community in Washington.

One interesting thing about the economy is that relatively large numbers of people worked from their home: 7.31% 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.

Being a small city, Castle Rock does not have a public transit system used by locals to get to and from work.

In terms of college education, the citizens of Castle Rock rank slightly lower than the national average. 15.83% of adults 25 and older in Castle Rock have a bachelor's degree or advanced degree, while 21.84% of adults have a 4-year degree or higher in the average American community.

The per capita income in Castle Rock in 2022 was $31,840, which is lower middle income relative to Washington and the nation. This equates to an annual income of $127,360 for a family of four. However, Castle Rock contains both very wealthy and poor people as well.

The people who call Castle Rock home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Castle Rock residents report their race to be White, followed by Native Hawaiian. Important ancestries of people in Castle Rock include German, Italian, English, Irish, and Swedish.

The most common language spoken in Castle Rock is English. Other important languages spoken here include Italian and Greek.