Bryn Mawr-Skyway is the only census-designated place in the Seattle metro area to report a majority-minority population in the 2000 Census. Bryn Mawr-Skyway also has the highest black population of any CDP in the entire Pacific Northwest, consisting of over a quarter of citizens. A significant Filipino-American community also exists.
According to the United States Census Bureau, the CDP has a total area of 3.3 square miles (8.7 km²), of which, 3.2 square miles (8.2 km²) of it is land and 0.2 square miles (0.4 km²) of it (5.09%) is water.
There were 5,574 households out of which 28.2% had children under the age of 18 living with them, 45.6% were married couples living together, 13.7% had a female householder with no husband present, and 35.8% were non-families. 27.9% of all households were made up of individuals and 9.3% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.08.
In the CDP the population was spread out with 22.8% under the age of 18, 7.9% from 18 to 24, 31.0% from 25 to 44, 24.4% from 45 to 64, and 13.9% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 97.6 males. For every 100 females age 18 and over, there were 95.3 males.
The median income for a household in the CDP was $47,385, and the median income for a family was $55,927. Males had a median income of $38,821 versus $31,443 for females. The per capita income for the CDP was $23,294. About 6.4% of families and 7.7% of the population were below the poverty line, including 9.3% of those under age 18 and 6.4% of those age 65 or over.