Bonney Lake was incorporated as a town on February 28, 1949, after the establishment of a co-op venture to bring electricity and tap water service to local residents. Several unsuccessful attempts were made to disincorporate the town from 1952 to 1972. The City of Bonney Lake and the Greater Bonney Lake Historical Society placed in 13 historical markers between 2009 and 2015.
As of the census of 2010, there were 17,374 people living in Bonney Lake. There were 5,989 households and 4,632 families living in the city. The population density was 2,188.2 inhabitants per square mile (844.9/km2). There were 6,394 housing units at an average density of 805.3 per square mile (310.9/km2). In the city, the population was spread out, with 32.0% under the age of 18, 7.3% from 18 to 24, 35.7% from 25 to 44, 20.3% from 45 to 64, and 4.6% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 106.5 males. For every 100 females age 18 and over, there were 107.0 males.
The median income for a household in the city was $60,282, and the median income for a family was $62,644. Males had a median income of $46,813 versus $31,837 for females. The per capita income for the city was $21,371. (Source: Wikipedia)