Flat Rock, Ohio

Flat Rock fell from 233 to 227 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. 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.

The same ground, surveyed 71 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1915 1986

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.

• 1915 USGS Siam quadrangle1:62500
• 1915 USGS Siam quadrangle1:62500
• 1956 USGS Toledo quadrangle1:250000
• 1956 USGS Toledo quadrangle1:250000
• 1956 USGS Toledo quadrangle1:250000
• 1956 USGS Toledo quadrangle1:250000
• 1960 USGS Flat Rock quadrangle1:24000
• 1960 USGS Flat Rock quadrangle1:24000
• 1960 USGS Flat Rock quadrangle1:24000
• 1961 USGS Toledo quadrangle1:250000
• 1986 USGS Lorain quadrangle1:100000
• 1986 USGS Lorain quadrangle1:100000

Museums hold 6 specimens collected within 10 miles of Flat Rock between 1943 and 1969: 5 Plantae, 1 Animalia. 5 distinct Species records are shown. Collected by C A Foster, Jones, G.T., R.L. Stuckey. Each is a physical object with a catalogue number, and each entry opens the museum's record. This is what was collected and kept, not a survey of what lives here - nothing can be concluded from a species being absent.

Image	Species	Year	Collected by	Where, as recorded
	Botrychium dissectum Spreng.	1969	Jones, G.T.	In moist deciduous woods. Thompson Twp., 1 mi. n. of West Lodi.
	Botrychium virginianum (L.) Sw.	1969	Jones, G.T.	In moist deciduous woods Thompson Twp., 3 mi. w. of Flat Rock.
	Dryopteris spinulosa (O.F.Müll.) Watt	1969	Jones, G.T.	in swampy deciduous woods Thompson Twp., 4 miles west of Flat Rock.
	Peromyscus leucopus (Rafinesque, 1818)	1943	C A Foster	FLATROCK
	Ludwigia alternifolia L.	1967	R.L. Stuckey	Reed Twp., between Sec. 7 and 18

All 6 specimens within 10 miles, at the Global Biodiversity Information Facility.

The federal mineral resources record lists 4 workings within 5 miles of Flat Rock: 2 past producers, 2 producers. 2 still produce. What was taken out: Limestone, General, Stone, Crushed/Broken, Limestone, Dimension, Stone, Crushed/Broken. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Every working recorded in Seneca County

The National Weather Service names Flat Rock in 4 storm reports between 2006 and 2025: 3 hail, 1 thunderstorm wind. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

Every storm recorded in Seneca County

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 1064655. 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.

Specimens. Global Biodiversity Information Facility (GBIF), https://www.gbif.org/. Only records licensed CC0 or CC BY are used. Records licensed CC BY-NC are excluded because this site carries advertising. Images are checked individually and any whose licence is non-commercial, no-derivatives or unreadable is refused.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.

Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.