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Historic places in Delaware

Delaware had 728 listed places as of May 22, 2026, according to the National Register of Historic Places.

728
Listings
Rank 45 of 51 states and DC by listings; a tie shares a rank.
15
National Historic Landmarks
Listings the file gives a National Historic Landmark designation date.
99
Historic districts
A district is one listing however many buildings it holds.
3
Counties with a listing
Counties and independent cities, as the file names them.
43
Restricted listings
Counted in every total; the file withholds where they are.
68.7
Per 100,000 residents
Listings over the Census Bureau’s 2025 population.

No street is shown for any listing, and a restricted listing carries no city.

Counties in Delaware

2 more columns on a wider screen

Counties in Delaware with a listing on the National Register, most listings first
CountyListings
New Castle419
Kent155
Sussex154

Counties in Delaware ranked by listings

By category

Places on the National Register in Delaware by the register’s category
CategoryListingsShare of the state’s listings
building56377.3%
district9913.6%
site486.6%
structure141.9%
not stated20.3%
object20.3%

By year listed

Today’s listings by the year each was listed, not the size of the register in that year: a place removed from the register is not in the file.

The most places listed in Delaware in one year is 86, in 1983

Places on the National Register in Delaware by the year each was listed, as the file holds them today. A year with no column had no listing in the file.

Today’s listings by the year each was listed, not the size of the register in that year: a place removed from the register is not in the file.

The year 2026 is not drawn: the year is not over, and the file’s newest listed date is May 21, 2026. Its 1 listings are in the table.

Source: The National Park Service

About this chart

The figures

The most places listed in Delaware in one year is 86, in 1983. Places on the National Register in Delaware by the year each was listed, as the file holds them today. A year with no column had no listing in the file.
Year listedListings
19664
19672
19705
197119
197225
197376
197413
19755
197619
197718
197846
197953
198013
19812
198266
198386
198416
198549
198624
198717
19888
19897
199019
19914
199214
199312
19949
19954
19962
19976
19987
19993
20015
20022
20034
20044
20051
20066
20072
20081
20093
20101
20115
20123
20131
20143
20153
20162
20176
20183
20194
20203
20212
20221
20232
20242
20253
Places on the National Register in Delaware by the year listed
YearListings
19664
19672
19705
197119
197225
197376
197413
19755
197619
197718
197846
197953
198013
19812
198266
198386
198416
198549
198624
198717
19888
19897
199019
19914
199214
199312
19949
19954
19962
19976
19987
19993
20015
20022
20034
20044
20051
20066
20072
20081
20093
20101
20115
20123
20131
20143
20153
20162
20176
20183
20194
20203
20212
20221
20232
20242
20253
20261

States by listings per 100,000 residents · States by National Historic Landmarks · Counties by listings

Compared with its neighbors

Delaware elsewhere on the Factbook

  • Reported crime Crime and justice

    Offenses reported to police by type, the trend, and the reporting coverage.

  • Cities by violent crime rate in Delaware Crime and justice

    What each agency serving 25,000 or more reported, ranked. Agency populations overlap, so these do not add up to the state.

  • Prison population Crime and justice

    People held under the state’s correctional authority, and the imprisonment rate. A different publisher counting a different thing.

  • Arrests by race, sex and age Crime and justice

    Arrests as the FBI’s participating agencies reported them, with what the figures can and cannot support at the top.

  • Hate crime Crime and justice

    Incidents reported to the FBI by bias motivation, as counts — the collection publishes no participation share, so there is no rate to compare states on.

  • Federal obligations Federal spending

    What federal agencies obligated against a place of performance in the state, per resident and by agency.

  • Registered nonprofits Nonprofits

    How many organizations the IRS lists in the state, what they report as revenue, and which kinds of work they do.

  • Payments to doctors Health

    What drug and device companies reported paying doctors with a practice address in the state, and the largest recipients.

  • Farm program payments Farm subsidies

    What the Farm Service Agency paid through the state’s county offices, by program and by recipient. The offices that administered the payments, not a count of farms: a recipient addressed elsewhere is counted where they were paid.

  • Paycheck Protection Program loans PPP loans

    The PPP loans SBA guaranteed to businesses operating in the state, by county, with how many carry a forgiveness amount and how many were charged off. Loans, not businesses: a business with two draws is two loans.

  • Population, age, income and origin Demographics

    The Census Bureau's population estimates year by year, with births, deaths and migration, and age, income, poverty, housing and origin from the American Community Survey, each with its margin of error.

  • Public schools Schools

    Pupils, schools and teachers, the largest districts, what districts spend per pupil and where the money comes from, and the colleges that take federal student aid.

  • Banks and credit unions Banks and credit unions

    The FDIC-insured banks headquartered in the state and their offices, and the credit unions based there and their sites, each per resident and against every other state.

  • Housing Housing

    The homes under HUD’s rental assistance programs in the state, by program and county, and its tax-credit housing, each per resident and against every other state.

  • Mortgage lending Mortgage lending

    The mortgage applications, loans and denials lenders reported in the state under the Home Mortgage Disclosure Act, and its largest lenders and counties.

  • Cost of living Cost of living

    BEA’s price level for the state against the nation, for goods, rents, utilities and other services, and its metro areas beside it.

  • Treatment facilities Treatment facilities

    Substance use and mental health treatment listings in the state, as SAMHSA’s directories print them: not a license, a rating or a recommendation.

  • Health centers Health centers

    Community health center sites in the state, from HRSA’s Data Warehouse, by county and by the organization that runs them: no rating and no recommendation.

  • Pandemic relief Pandemic relief

    COVID-19 relief obligated to the state’s government, from PRAC’s state workbook, by awarding agency: not every award made in the state, and no PPP loan.

  • County health County health

    CDC’s model-based estimates of adult health, risk behaviors and prevention for every county in the state, each with its 95% interval.

  • Health care exclusions Health care program exclusions

    Every exclusion in effect in the state on OIG’s list of people and organizations barred from Medicare, Medicaid and every other federal health care program, by authority and year.

  • Registered aircraft Aircraft registry

    Aircraft on the FAA’s register whose registrant’s address is in the state, and the kind of registrant that holds them.

  • H-1B salaries H-1B salaries

    The offered wages on H-1B applications the Department of Labor certified with a first worksite in the state, by occupation, each median with the count behind it.

  • Disaster declarations Disasters

    Every federal disaster declaration FEMA made for the state, by type, incident and county, with each measure’s rank among the states and territories.

  • College athletics Sports

    Every college in the state that reported to the Equity in Athletics survey, ranked by its athletics revenue, with its expenses, athletes and athletic aid.

  • Federal civilian workforce Federal salaries

    Federal civilian employees stationed in the state by agency and occupation, with the pay OPM publishes and the share it withholds.

  • The Delaware Factbook entry Across the Factbook

    Every measure the Factbook publishes for this state in one place, each with where it ranks among the others and the record it came from.

The immigration hub has no page for this state: EOIR runs no immigration court here, and CBP publishes by sector and field office, which are its own areas of responsibility rather than a geography. Immigration and the border.

Sources

Compiled automatically from National Register of Historic Places — listed properties spreadsheet and Census Bureau population estimates — nation and states, with components of change by a checked SQL query · Editor: Kian O'Connor · How this site is built

No claim to original U.S. Government works. The National Park Service does not endorse this site.

Data retrieved