Before 1682, Montgomery County was the home of the Lenni Lenape Indians, a branch of the Delaware tribe. When William Penn founded Pennsylvania, the first settlements in this area were made by the English and Welsh. During the American Revolution, the countryside was the scene of several skirmishes and encampments, but is most noted as the scene of the encampment at Valley Forge.

Montgomery County was created in 1784 out of part of Philadelphia County. Nearly all the boroughs in Montgomery County, except those along the Schuylkill River, were born from the extension of the railroads. While these boroughs were growing and expanding from 1880 to 1920, most of the townships remained rural with many active farms.

As early as 1690, kilns were built to make lime, an industry still operating in the county. Later, marble was quarried. The first copper mine in the state was opened before 1720 near Schwenksville. Industries such as heavy manufacturing and steel mills were developed along the banks of the Schuylkill River.

The county was the scene of the first canal construction in the United States when work was started in Norristown in 1792; but it was never completed. The county was also the scene of the first turnpike constructed in Pennsylvania. Here macadam was used for the first time in America.

Within Montgomery County one can find residential areas, multi-million dollar industries, modern shopping centers, beautiful farms, and woodlands.

Montgomery County is comprised of 62 municipalities, each having its own governmental structure. Within its 482 square miles, there are 24 boroughs and 38 townships, with the county seat located in Norristown. Montgomery County is the third largest county by population in the state, following Philadelphia and Allegheny counties.

The TriCounty Area Chamber of Commerce serves the municipalities of Collegeville, Douglass, East Greenville, Green Lane, Limerick, Lower Frederick, Lower Pottsgrove, Marlborough, New Hanover, Pennsburg, Perkiomen, Pottstown, Red Hill, Royersford, Schwenksville, Skippack, Trappe, Upper Frederick, Upper Hanover, Upper Pottsgrove, Upper Providence, and West Pottsgrove in Montgomery County.