How Many People Live In Arizona 2024. The largest county in arizona by population count is maricopa county, which is home to 4.1 million of the state's 6.9 million people. It is the 6th largest state by area.
The largest county in arizona by population count is maricopa county, which is home to 4.1 million of the state’s 6.9 million people. The population of arizona is concentrated around phoenix, the state capital, and tucson, the second largest city in the state.