Unionville, Illinois

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.

• 1899 USGS Danville quadrangle1:62500
• 1900 USGS Danville quadrangle1:62500, 7 printings
• 1949 USGS Danville SW quadrangle1:24000, 2 printings
• 1950 USGS Danville SW quadrangle1:24000
• 1953 USGS Danville quadrangle1:250000, 3 printings
• 1955 USGS Danville quadrangle1:250000
• 1956 USGS Danville quadrangle1:250000
• 1966 USGS Danville SW quadrangle1:24000, 2 printings
• 1984 USGS Danville quadrangle1:100000
• 1987 USGS Danville quadrangle1:100000

History of Vermilion County, Together with Historic Notes on the Northwest, Gleaned from Early Authors, Old Maps and Manuscripts, Private and Official Correspondence, and Other Authentic, Though, for the Most Part, Out-of-the-way Sources, published 1879; History of Vermilion County, Illinois : a Tale of Its Evolution, Settlement, and Progress for Nearly a Century, published 1911 has no passage naming this settlement, which was common for smaller places. Its township is covered in full.

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 420147. 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.