Based on per capita income, one of the more reliable measures of affluence, Ravensdale ranks 50th of 522 areas in the state of Washington to be ranked.
In 1907, Ravensdale, Washington was a coal mining town with a population of about 1,000 residents, most of whom worked for the mining company. In 1915 the mine was closed permanently due to an explosion which both destroyed the mine and killed 31 workers.
According to the United States Census Bureau, the CDP has a total area of 5.1 square miles (13.3 km²), of which, 5.0 square miles (13.0 km²) of it is land and 0.1 square miles (0.3 km²) of it (2.14%) is water.
There were 301 households out of which 36.9% had children under the age of 18 living with them, 62.8% were married couples living together, 6.0% had a female householder with no husband present, and 27.9% were non-families. 22.3% of all households were made up of individuals and 5.6% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.19.
In the CDP the population was spread out with 26.1% under the age of 18, 7.6% from 18 to 24, 27.1% from 25 to 44, 29.9% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 108.2 males. For every 100 females age 18 and over, there were 110.8 males.
The median income for a household in the CDP was $44,850, and the median income for a family was $61,741. Males had a median income of $33,182 versus $30,536 for females. The per capita income for the CDP was $28,300. About 6.1% of families and 10.8% of the population were below the poverty line, including 12.7% of those under age 18 and 7.8% of those age 65 or over.
10% of Ravensdale residents aged 25 and older have a bachelors degree.