Frankfort Square, Illinois

Frankfort Square fell from 9,276 to 8,968 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

• 1890 USGS Des Plaines quadrangle1:62500
• 1894 USGS Des Plaines quadrangle1:62500
• 1900 USGS Des Plaines quadrangle1:62500
• 1901 USGS Des Plaines quadrangle1:62500, 5 printings
• 1929 USGS Tinley Park quadrangle1:24000, 3 printings
• 1953 USGS Chicago quadrangle1:250000, 5 printings
• 1953 USGS Tinley Park quadrangle1:24000
• 1957 USGS Chicago quadrangle1:250000
• 1963 USGS Tinley Park quadrangle1:24000, 4 printings
• 1980 USGS Chicago quadrangle1:100000
• 1993 USGS Tinley Park quadrangle1:24000

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

This settlement is recorded in the Geographic Names Information System as feature 1867268. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.