Isaac Harmon Farmhouse

Listed on the National Register of Historic Places in 1979.

From the record

“Isaac Harmon Farmhouse is a historic farmhouse located near Millsboro, Sussex County, Delaware. It was built about 1845, and is a two-story, four-bay, single pile, wood frame dwelling clad in clapboard.”
Wikipedia article Isaac Harmon Farmhouse, CC BY-SA 4.0.

One of 136 National Register listings published here for Sussex County · listed in 1979 · category: Building.

Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

The listing

What is counted as historic. The nomination lists 1 building as contributing to the listing.
Listed as. Harmon, Isaac, Farmhouse - the National Register files a house under its owner's surname.
Address. CR 312A, Millsboro, 19966
When was it listed? April 1979
Category. building
Also known as. Nanticoke Indian Community TR
Census division. Millsboro
National Register reference number. 79003315 - the number the National Park Service assigned this property when it was listed, and the key its nomination file is catalogued under at the National Archives.

Fires near this property

19 since 2002

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 19 fires within 5 miles of Isaac Harmon Farmhouse between 2002 and 2012, burning about 14 acres in total. None started naturally. None was recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

Reported cause	Fires
Missing data/not specified/undetermined	7
Recreation and ceremony	6
Smoking	5
Misuse of fire by a minor	1

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Date	Cause	Size	Reported by	Name on the report
11 August 2002	Missing data/not specified/undetermined	under an acre	Delaware State Fire Marshal's Office	not named
11 July 2004	Smoking	under an acre	Delaware State Fire Marshal's Office	not named
16 June 2012	Smoking	1.0 acres	Delaware Forest Service	not named
12 June 2003	Missing data/not specified/undetermined	under an acre	Delaware State Fire Marshal's Office	not named
13 May 2003	Missing data/not specified/undetermined	under an acre	Delaware State Fire Marshal's Office	not named
8 April 2002	Missing data/not specified/undetermined	under an acre	Delaware State Fire Marshal's Office	not named
5 April 2012	Recreation and ceremony	under an acre	Delaware Forest Service	not named
5 April 2012	Misuse of fire by a minor	7.0 acres	Delaware Forest Service	not named

Every fire recorded in Sussex County

Storms near this property

20 since 1993

Regional context, not property-specific evidence. The National Weather Service names Millsboro, the town this property stands in, in 20 storm reports between 1993 and 2025: 10 thunderstorm wind, 4 hail, 4 funnel cloud, 1 lightning. 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.

When	Event	Place named	Harm	What the report says
June 2006	Lightning	Millsboro	$1,000	no account filed
November 1993	Thunderstorm Wind	Millsboro	$500	Thunderstorm winds downed trees and power lines across the town.
August 1994	Hail	Millsboro	$50	Dime-sized hail fell east of Millsboro on Route 24. The hail was reported by Delaware Emergency Management Agency.
July 2023	Thunderstorm Wind	Millsboro	-	A few reports of trees and power lines down across Millsboro. Time estimated from radar.
June 2021	Thunderstorm Wind	Millsboro	-	A tree was downed across Gravel Hill Rd and Doc Frame Rd.
February 2020	Thunderstorm Wind	Millsboro	-	A tree fell onto the roof of a home on River Dr. Time estimated from radar.
June 2019	Thunderstorm Wind	Millsboro	-	Power lines were reported down near Millsboro. Time of event estimated from radar.
September 2016	Flood	Millsboro	-	Roadway flooding at the intersection of routes 113 and 26. Flooding also along route 20 and other spots on 113.
August 2016	Thunderstorm Wind	Millsboro	-	Trees downed from thunderstorm winds in the Stormwater Creek Development.
July 2012	Hail	Millsboro	-	A thunderstorm dropped penny size hail in Millsboro.
June 2012	Thunderstorm Wind	Millsboro	-	A severe thunderstorm knocked trees down in the Millsboro area around 855 AM EDT on June 25th.
May 2010	Thunderstorm Wind	Millsboro	-	A severe thunderstorm tore down several large tree limbs in Millsboro.
August 2008	Funnel Cloud	Millsboro	-	A funnel cloud was noticed over Millsboro. It did not touch down or cause any damage.
May 2025	Hail	Millsboro	-	no account filed
April 2006	Hail	Millsboro	-	no account filed
April 2006	Funnel Cloud	Millsboro	-	no account filed
August 2006	Thunderstorm Wind	Millsboro	-	no account filed
June 2005	Funnel Cloud	Millsboro	-	no account filed
May 2000	Thunderstorm Wind	Millsboro	-	no account filed
June 1997	Funnel Cloud	Millsboro	-	no account filed

Every storm recorded in Sussex County

Map coverage status

No historic map-sheet match is published for this property yet. That does not mean no map exists. This record needs a coordinate-quality review before it can be joined to a sheet boundary. Browse the county's mapped places while that work is pending.

Listed places nearby

6 within 8 miles

Other National Register properties close enough to walk or drive between, ordered by distance from this one. Both positions come from the same geocoding pass that matched these properties to their map sheets.

Property	Distance	Listed
Robert Davis Farmhouse	0.7 miles	1979
Indian Mission School	0.9 miles	1979
Harmon School	1.1 miles	1979
Ames Hitchens Chicken Farm	1.2 miles	1979
Harmony Church	1.2 miles	1979
Johnson School	1.8 miles	1979

Sources for this property

National Archives record	The nomination case file for reference 79003315 in Record Group 79.
Wikipedia article	Community-written account of this property, licensed CC BY-SA.
Sussex County	All 136 listed properties in this county.

Provenance

Listing record. National Park Service National Register of Historic Places, listed-properties dataset, current to 2026-05-22.
Map join. Address geocoded through the United States Census geocoder, then tested against the published boundary of every sheet in the USGS Historical Topographic Map Collection.
How this page is made. Listing fields come from federal records; map-sheet coverage is a labelled coordinate-to-boundary calculation, not a source-field claim.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
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.