Montgomery County Texas map
30.30° N · 95.50° W · County seat: Conroe · 1,077 sq mi · Central Time
Montgomery County's largest community is not a city at all. The Woodlands, with 114,436 residents in 2020, is an unincorporated township governed by a special district rather than a mayor and council, which leaves Conroe — a third smaller in 2020 — holding the courthouse and the title of largest incorporated place. The county grew from 620,443 people in 2020 to an estimated 749,613 in 2024, one of the fastest climbs in Texas.
I-45 runs north–south through Conroe and The Woodlands. The large body of water west of Conroe is Lake Conroe; the wooded block northwest of it is part of the Sam Houston National Forest.
Where Montgomery County is
The county is the northern edge of the Houston metropolitan area, where the coastal prairie gives out and the pine forest starts. Walker County lies north, San Jacinto County northeast, Liberty County east, Harris County south, Waller County west and Grimes County northwest. The Harris County line is the one that matters: Houston's city limits actually reach across it, and 6,022 Houston residents were counted inside Montgomery County in 2020.
Conroe sits near the county's centre and The Woodlands ten miles south of it down I-45. Downtown Houston is 38 miles south in a straight line, College Station 54 miles northwest and Sugar Land 48 miles south.
The county was cut out of Washington County in 1837, in the first months of the Republic, and takes its name from the town of Montgomery in the county's west — which in turn was named for Andrew J. Montgomery, who fought at San Jacinto in 1836. The town of Montgomery held the courthouse until 1889, when the county seat moved to Conroe and the railroad.
Cities and towns
| Place | Type | 2020 population in county |
|---|---|---|
| Conroe | City (county seat) | 89,973 |
| Willis | City | 6,431 |
| Houston (part) | City | 6,022 |
| Shenandoah | City | 3,493 |
| Oak Ridge North | City | 3,059 |
| Panorama Village | City | 2,516 |
| Magnolia | City | 2,414 |
| Montgomery | City | 1,945 |
| Roman Forest | City | 1,776 |
| Splendora | City | 1,683 |
| Patton Village | City | 1,648 |
| Woodbranch | City | 1,331 |
| Cut and Shoot | City | 1,083 |
| Stagecoach | Town | 581 |
Those fourteen incorporated places hold under a quarter of the county's residents. The rest live in master-planned communities and municipal utility districts that have never incorporated — The Woodlands first among them.
An unincorporated township
The Woodlands opened in 1974 as a master-planned community developed by George P. Mitchell on timberland straddling the Harris County line, and it has grown into the largest community in the county without ever becoming a city. Instead it is run by The Woodlands Township, a special-purpose district with an elected board that collects a sales tax and property tax and contracts for law enforcement, fire service and parks. Its villages are laid out along a spine of forested greenbelts and hike-and-bike paths, with the office and retail core at Town Center beside I-45 and the man-made Woodlands Waterway.
Conroe, meanwhile, is a conventional city with an old county-seat square, an oil-boom past — the Conroe field came in during the early 1930s and paid for the county's courthouse era — and a modern industrial and lakeside economy. Around both, Shenandoah and Oak Ridge North are small incorporated pockets along the freeway service roads, and Magnolia and Montgomery anchor the fast-growing western side.
Lake Conroe and the national forest
Lake Conroe was impounded on the West Fork of the San Jacinto River in 1973 as a water supply reservoir, and it now sets the pattern of settlement across the western half of the county: subdivisions, marinas and golf courses on the south and east shores, and quieter water at the north end, where the lake's upper arm reaches into the Sam Houston National Forest. FM-1097 crosses the lake at Willis and FM-1375 crosses the upper end near the forest boundary.
The national forest covers a band of the county's northwest corner and continues into Walker and San Jacinto counties; the Lone Star Hiking Trail runs through it. W. G. Jones State Forest, a smaller state-managed pine tract on FM-1488 between Conroe and Magnolia, is one of the few places in the region set aside for the endangered red-cockaded woodpecker.
Roads
- I-45 – the county's main street, running from the Harris County line north through The Woodlands, Shenandoah, Conroe and Willis toward Huntsville and Dallas.
- I-69 / US-59 – the eastern freeway, entering from Harris County near Kingwood and running north past Porter, Splendora and Cleveland.
- SH-99, the Grand Parkway – the outer Houston loop, crossing the southern county between the two freeways through New Caney and Spring.
- SH-105 – the east–west route through Conroe, west across the Lake Conroe dam toward the town of Montgomery and Navasota, east toward Cleveland.
- SH-242 – links I-45 at The Woodlands with I-69 at New Caney, the busiest connector between them.
- SH-249 – the tolled route northwest from Tomball through Pinehurst, continuing as the Aggie Expressway toward Todd Mission and Navasota.
- SH-75 – the old highway alongside I-45 through Conroe and Willis.
- Loop 336 – the ring road around Conroe; Loop 494 serves Porter and Kingwood on the I-69 side.