Built in the 1840s
William Henry Harrison died a month into his term in 1841 and John Tyler served the rest, then James K. Polk from 1845 and Zachary Taylor from 1849. Texas was annexed in 1845 and the war with Mexico ran from 1846 to 1848. Gold was found in California in 1848. Famine in Ireland began a migration that reshaped the eastern cities.
720 places on the National Register have a construction year in the 1840s on record. They stand in 43 states and territories. Of those, 50 are National Historic Landmarks.
Construction years come from Wikidata, matched on National Register reference number. Only plain four-digit years are counted, so a place recorded as circa or as a range is left out. Data refreshed November 02, 2026.
By state
Longest-lived styles of the decade
| Style | In the 1840s | Dated examples, all decades | Years in use |
|---|---|---|---|
| Greek Revival | 321 | 1334 | 1660 to 2010 |
| Georgian | 2 | 264 | 1645 to 1986 |
| Neoclassical | 11 | 1199 | 1680 to 2016 |
| Federal | 42 | 751 | 1674 to 1996 |
| Vernacular | 6 | 191 | 1662 to 1984 |
| Renaissance Revival | 12 | 558 | 1695 to 2015 |
| Gothic Revival | 41 | 807 | 1698 to 2017 |
| Colonial Revival | 6 | 911 | 1690 to 1998 |
Style labels come from Wikidata. A style is ranked by the span between the earliest and latest dated listing that carries it, across the whole register, and only styles with two or more listings in this decade are shown. Data refreshed November 02, 2026.
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Places with full records
Show all 50 placesHide
The other 670 listings from this decade are on the state pages above and on their county pages.