I determine the US marketable population by using the information from the latest US census. The US census, which is conducted every 10 years, is used as a foundational tool for many business use cases. It tells us how many people live is a given area and across the nation. It contains core demographics about people, including for example age, income, education and occupation. I first use the Census Population Clock to determine estimated marketable population is the US. I then download the population by age pyramid, before filtering by age 18+.
Today’s US marketable population is
332,713,915 * 77.87% = 259,117,597