The first settlers of present-day Hampton Township in northern Allegheny County arrived in the mid- to late 18th century around the time of the Revolutionary War.

In 1794, John McCaslin obtained a large section of land presently known as Oak Hill Farms near the junction of Route 8 and Mt.

Many geographical landmarks in the area bear the names of early settlers such as Robert and James Sample, William and Henry McCully, and John McNeal.

[2] In 1861, Moses Hampton, LLD, a judge and member of Congress, signed the documents necessary to make Hampton into a municipality comprising parts of McCandless, Indiana, and West Deer townships.

[3] According to the United States Census Bureau, the township has a total area of 16.0 square miles (41 km2), of which 0.06% is water.

At the 2000 census there were 17,526 people, 6,253 households, and 4,896 families living in the township.