[2] It is a suburb of Allentown in the Lehigh Valley region of eastern Pennsylvania.

Dillingersville Union School and Church in Lower Milford Township, built in 1885, was added to the National Register of Historic Places in 1978.

Saucon Creek begins in Lower Milford and drains part of it north into the Lehigh River.

Lower Milford Township has a hot-summer humid continental climate (Dfa) and is in hardiness zone 6b.

[6] Interstate 476 follows the Pennsylvania Turnpike's Northeast Extension through the northern and eastern parts of Lower Milford Township on a southeast–northwest alignment.

However, the nearest interchange is in neighboring Milford Township in Bucks County.

In addition to Coopersburg and Upper Saucon Township, Lower Milford is served by the Southern Lehigh School District.