Houston Population 2024 By County. The most populated counties in texas are harris county with 4,835,125, dallas county at 2,606,358, tarrant county with 2,182,947, bexar county at 2,087,679,. 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.

Discover houston county, tx’s population & how it has changed over time. Houston, the largest city in texas, is next on our list.