The community is situated in the heart of Seneca Township at the junction of Franklinville Road (County Highway T-68) and Garden Valley-Perkins Road. A minor middle branch of the Kishwaukee River — called Franklinville Creek by some — crosses the community in a northeast-to-southwest direction. In terms of geographic coordinates, the community is located at 42°16′36″N88°30′40″W / 42.27667°N 88.51111°W / 42.27667; -88.51111 (42.2766886, -88.5112025)[4] In terms of the Public Land Survey System, Franklinville is divided between Sections 22 and 23, Township 44 North, Range 6 East of the Third Principal Meridian.[5]
Franklinville CDP, Illinois – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
Franklinville is the site of the old Seneca Township Hall (built circa 1885) and the Franklinville cemetery. The modern office of Seneca Township is located approximately three-quarters of a mile west of the crossroads at 16506 Garden Valley Road (post office: Woodstock, IL 60098).[9]