Greater Phoenix Population 2024. Phoenix population in 2025 is estimated to be 1.65 million, its fifth largest populous city in u.s with an area of 519.11 sq miles (1,344.50 sq.km). The fastest population growth happened in the southern u.s., with more than half of the 15 fastest growing cities located in texas.
We use first day of july each year due to us census bureau normally publishes the estimated. Ever wonder how many people live in phoenix, az and how fast that number changes?