Houston Metro Population 2024 Population.  — the population count of houston metro area (tx) was 6,779,104 in 2018.  — the houston area's population gains were led by harris county — the nation's third most populous county — which grew by nearly 54,000, the largest increase in the nation.

 — the area has a 2.25% share of the total american population and a 5.05% share of 2024 college graduates.  — the population count of houston metro area (tx) was 6,779,104 in 2018.