Decade built · 1720s

Built in the 1720s

Colonial population roughly doubled over the decade as German and Scots-Irish families arrived through Philadelphia. Baltimore was founded in 1729. Georgian proportions and sash windows were becoming the ordinary way to build a substantial house.

76 places on the National Register have a construction year in the 1720s on record. They stand in 14 states and territories. Of those, 8 are National Historic Landmarks.

← 1710s · 1730s →

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.

Listings

States

National Historic Landmarks

Historic districts

By state

Massachusetts 38New Jersey 7New York 6Pennsylvania 5Connecticut 4Virginia 4Maryland 3Louisiana 2Texas 2Alabama 1California 1Florida 1Georgia 1New Hampshire 1

Longest-lived styles of the decade

Style	In the 1720s	Dated examples, all decades	Years in use
Greek Revival	2	1334	1660 to 2010
Georgian	12	264	1645 to 1986
Federal	4	751	1674 to 1996
Colonial	11	136	1641 to 1956
Colonial Revival	2	911	1690 to 1998
American colonial	8	40	1665 to 1913
Dutch colonial	2	8	1695 to 1835
First Period	18	76	1641 to 1750

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.