There is a list of fire departments at the National Fire Department Registry. Registration is voluntary, yet as of today (November 2020), there are 27,182 departments listed, which is about 91 percent of all fire departments in the USA.¹⁾.

Between 30 percent to 40 percent of firefighters in California's state fire department, which fights many of the wildfires across the state, are prison inmates.²⁾.