Population Of Houston Tx 2025. The current population of south houston, texas is 15,694 based on our projections of the latest us census estimates (released may 2025). The houston population in 2025 is estimated to be 2.31 million, covering the area of 637 sq miles.

Houston was recognized as the second fastest growing u.s. Houston has a 2025 population of 2,319,119.