Delaware, Ohio

This curated hub for Delaware County, Ohio brings together the page's documented record links, visible map or image evidence where published, and routes to related local records.

• Open map evidence
• Research guide
• Delaware County County hub

Delaware grew from 34,753 to 41,302 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 68 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1924 1992

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.

• 1924 USGS Delaware quadrangle1:62500
• 1925 USGS Delaware quadrangle1:62500
• 1944 USGS Delaware quadrangle1:62500
• 1950 USGS Marion quadrangle1:250000
• 1960 USGS Delaware quadrangle1:24000
• 1960 USGS Delaware quadrangle1:24000
• 1960 USGS Delaware quadrangle1:24000
• 1962 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1986 USGS Bellefontaine quadrangle1:100000
• 1992 USGS Bellefontaine quadrangle1:100000

Museums hold 2,724 specimens collected within 10 miles of Delaware between 1850 and 1975: 2,559 Animalia, 100 Plantae, 60 Fungi, 2 Unrecorded, 2 Protozoa, 1 Chromista. 12 distinct Species records are shown. Collected by A S BRADSHAW, A. P. Morgan, A. Spreitzer & K. Borror and others. 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
	Ovularia obliqua (Cooke) Oudem.	1896	F.L. Stevens
	Peronospora arthurii Farl.	1896	F.L. Stevens	Alum Creek
	Puccinia asteris Duby	1896	F. L. Stevens	Alum Creek
	Ectopistes migratorius (Linnaeus, 1766)	1850	Kugel, B. (Burt)	near Selma, Ohio, USA
	Podiceps auritus (Linnaeus, 1758)	1860	Ricke, A. S.	Carlisle, Ohio, USA
	Vernonia maxima Small	1871	Collector unspecified	Scioto
	Centronyx henslowii (Audubon, 1829)	1872	not recorded	Licking Reservoir, Ohio, USA
	Ophioglossum vulgatum L.	1873	Hussey, J.
	Bonasa umbellus (Linnaeus, 1766)	1874	not recorded	Sugar Grove, Ohio, USA
	Branta bernicla hrota (O.F.Müller, 1776)	1874	not recorded	Lake Erie, Ohio, USA
	Melospiza lincolnii (Audubon, 1834)	1874	Wheaton, J. M. (John Maynard)	Licking Reservoir, Ohio, USA
	Phalaropus lobatus (Linnaeus, 1758)	1874	Jasper, T. (Theodore)	Columbus, Scioto R., Ohio, USA

All 2,724 specimens within 10 miles, at the Global Biodiversity Information Facility.

The National Weather Service names Delaware in 83 storm reports between 1994 and 2025: 52 thunderstorm wind, 19 hail, 6 flood, 4 flash flood. The reports record 1 injury. 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 Delaware County

1 paper published in this town, digitised by the Library of Congress and free to read: 0 issues, 0 pages. Every page is searchable, so a name or a street can be looked for directly in what the town printed about itself at the time.

Front pages of the local paper, read from the Library of Congress scans: 4 issues spread across its run from 1858 to 1858, 29,933 words in total. Each is reproduced on its own page, exactly as the recogniser returned it.

These pages read less well than anything else here, and the number is worth stating: about three words in four come through cleanly, against nine in ten for the building records. An 1896 broadsheet sets eight-point type in seven columns on microfilm, which is the hardest thing in this archive to read by machine. We tested our own recognisers against the Library's and they were not better, so the Library's text is what appears, with the wholly unreadable columns removed. Read it as a guide to what the paper covered, and follow the link to the scan before quoting anything.

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 1064521. 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.

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.