Decade built · 1820s

Built in the 1820s

Monroe served until 1825 and John Quincy Adams followed. The Missouri Compromise of 1820 drew a line across the territories for slavery, and the Monroe Doctrine of 1823 warned Europe off the hemisphere. The Erie Canal opened in 1825 and the first American railroads were chartered at the end of the decade.

400 places on the National Register have a construction year in the 1820s on record. They stand in 34 states and territories. Of those, 34 are National Historic Landmarks.

← 1810s · 1830s →

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.

400

Listings

States

National Historic Landmarks

Historic districts

By state

Massachusetts 55 New York 50 North Carolina 31 Maine 29 Pennsylvania 22Ohio 19Tennessee 18Virginia 18Kentucky 16Mississippi 14Georgia 13Louisiana 11Maryland 10Connecticut 9South Carolina 9New Hampshire 8New Jersey 8Rhode Island 8Florida 7Vermont 7Alabama 6District of Columbia 5Michigan 4Wisconsin 4Indiana 3Missouri 3West Virginia 3Kansas 2New Mexico 2Puerto Rico 2Alaska 1California 1Illinois 1Nebraska 1

Longest-lived styles of the decade

Style	In the 1820s	Dated examples, all decades	Years in use
Greek Revival	56	1334	1660 to 2010
Georgian	6	264	1645 to 1986
Neoclassical	6	1199	1680 to 2016
Federal	130	751	1674 to 1996
Gothic Revival	13	807	1698 to 2017
Colonial Revival	7	911	1690 to 1998
Italianate	4	869	1712 to 1988
Queen Anne style	2	1126	1753 to 1989

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.