Conroe is a city in Texas, United States. It is the seat of MontgomeryCounty and falls within Houston?The Woodlands metropolitan area. This city is about 40 miles north of Houston.As of 2016, the city population was 82,286, up from 56,207 in 2010. According to the Census Bureau, Conroe was the fastest-growing large city in the United States between July 1, 2015, and July 1, 2016.