Phoenix Population 2024 Forecast. In june, the maricopa association of governments (mag) released their population projections for a number of municipalities within maricopa county, with phoenix having one the fastest growth rates. 10 most populated city, phoenix is expected to grow to 22.27 million residents by 2100, assuming the metro’s population growth continues at the.

4 with a nominal growth of 54,916. Phoenix has experienced consistent growth over the years, with annual.