Montgomery County

Administrative district of central Maryland; area 1,282 sq km, 495 sq mi, population (1990) 757,000. The county seat is at Rockville. Its northeastern border is the Patuxent River, while the Potomac River forms its western and southern boundaries.

Montgomery County is a rolling area in the Piedmont, and is drained by Rock Creek. It is a traditionally agricultural county that also contains several affluent suburbs of Washington DC (including Chevy Chase, Bethesda, Rockville, Gaithersburg, and Takoma Park). A number of government institutions are located here.

Montgomery County

Administrative district in east-central New York State; area 1,046 sq km/404 sq mi, population (1990) 52,000. The county is traversed from east to west by the Mohawk River and the New York State Barge Canal, and lies in the Mohawk Valley. Its seat is at Fonda and its largest city is Amsterdam. In this fertile lowland county, agriculture – predominantly dairy farming – is a major economic activity.

Montgomery County

Administrative district of southwestern Ohio, area 1,186 sq km/458 sq mi, population (1990) 573,800. The county's seat is located at Dayton, and it is crossed by the Great Miami, Mad, and Stillwater rivers.

Together with its suburbs, the industrial city of Dayton occupies the entire eastern half of the county. Agriculture here includes rearing livestock and dairy farming, cultivating cereals and tobacco, and market gardening. There are sand and gravel workings, and cement factories. Notable sights in Montgomery County are the ancient Miamisburg Mound State Memorial and the modern Englewood Dam.

Montgomery County

Administrative district of southeastern Pennsylvania; area 1,259 sq km/486 sq mi, population (1990) 678,100. Its seat is Norristown.

Montgomery County lies directly to the north and west of Philadelphia, and encompasses a number of the city's suburbs. These include the townships of Abington, Cheltenham, Lower Merion, and Upper Merion, as well as industrial centres such as Conshohocken, Norristown, and Pottstown. In the far northwest, the county has rich agricultural land that is gradually being encroached upon by suburban sprawl.

Montgomery County

Administrative district of eastern Texas; area 2,704 sq km/1,044 sq mi, population (1990) 182,200.

Montgomery County is drained by forks and tributaries of the San Jacinto River, and is bisected by Interstate 45. It contains parts of the Sam Houston National Forest, and produces lumber, oil and natural gas. Crops grown here are sweet potatoes, cotton, vegetables, and peanuts; livestock farming includes beef and dairy cattle, poultry, and pigs. The southern part of the county in particular is home to many commuters who work in Houston.