|2010 Census Population:||897,934 (45th)|
|Land Area:||1,948.5 square miles (49th)|
|Density:||460.8 persons per square mile (6th)|
|Became a State:||December 7, 1787 (1st)|
|Bordering States:||Maryland, New Jersey, Pennsylvania||Abbreviation:||DE|
The area of Delaware was part of the original territory of the United States. Included in the grant to William Penn, the Three Lower Counties (Delaware) were annexed as part of the grant establishing the Province of Pennsylvania in 1683. The counties were granted a separate charter providing semi-autonomy in 1701, with generally the same boundary as the present state. In 1776, Delaware declared itself a separate government. Delaware ratified the U.S. Constitution on December 7, 1787; it was the first of the original 13 states to join the Union.
Census data for Delaware are available beginning with the 1790 census.
Delaware has two state designated tribal statistical areas (SDTSAs).
Delaware has two metropolitan statistical areas, one micropolitan statistical area, one metropolitan division, and one combined statistical area.
There are three counties in Delaware. Kent County’s governing body is the levy court. New Castle and Sussex counties’ are each governed by a county council.
There are 27 county subdivisions in Delaware. They are all census county divisions (CCDs), which are delineated for statistical purposes, have no legal function, and are not governmental units. CCDs were first established in Delaware for the 1970 census. Prior to 1970, the minor civil divisions used in the census included (State) representative districts and hundreds.
Delaware has 78 places; 57 incorporated places and 19 census designated places (CDPs). The incorporated places consist of 10 cities, 44 towns, and 3 villages.
Delaware has 218 census tracts, 574 block groups, and 24,115 census blocks.
For the 111th Congress (January 2009-January 2011), Delaware has one congressional district. Beginning with the 113th Congress (January 2013-January 2015), Delaware will continue to have one congressional district as a result of reapportionment based on the 2010 Census.
Delaware has 16 unified school districts.
There are 21 state senate districts and 41 state house districts in Delaware.
There are 68 ZIP Code tabulation areas (ZCTAs) in Delaware.
The northern boundary between the State of Delaware and the Commonwealth of Pennsylvania is known as the Twelve-Mile Circle. The boundary is a circular arc forming a twelve-mile radius centered at the cupola of the courthouse in the town of New Castle, DE.
|Year||North Latitude||West Longitude|
|20106||39° 21′ 32″||75° 33′ 25″|
|20006||39° 23′ 50″||75° 33′ 43″|
|19905||39° 26′ 01″||75° 33′ 59″|
|19804||39° 26′ 42″||75° 33′ 49″|
|19703||39° 28′ 44″||75° 33′ 33″|
|19603||39° 27′ 51″||75° 33′ 03″|
|19503||39° 24′ 43″||75° 33′ 14″|
|19402||39° 20′ 09″||75° 32′ 60″|
|19302||39° 20′ 21″||75° 33′ 04″|
|19201||39° 25′ 14″||75° 32′ 09″|
|19101||39° 11′ 49″||75° 35′ 06″|
|19001||39° 11′ 35″||75° 35′ 09″|
|18901||39° 11′ 09″||75° 35′ 36″|
|18801||39° 09′ 50″||75° 35′ 30″|
1 Source: U.S. Department of Commerce, Bureau of the Census, Fourteenth Census of the United States, 1923
2 Source: U.S. Census Bureau, recomputation for historical county level data which relied upon aggregate county level population data with an estimated county centroid resulting in a possible error of up to one mile.
3 Source: U.S. Department of Commerce, Bureau of the Census, Centers of Population for States and Counties, 1974
4 Source: U.S. Census Bureau, Geography Division, recomputation from archived national block group/enumeration area data resulting in a possible error of up to 1,000 feet.
5 Source: U.S. Census Bureau, Geography Division, recomputation from archived national block group data resulting in a possible error of up to 1,000 feet.
6 Source: U.S. Census Bureau, computation from national block-level data
(Persons per square mile)
|County||New Castle County||538,479||Sussex County||936.08||New Castle County||1,263.2|
|- Inc Place||Wilmington city||70,851||Dover city||23.15||Bellefonte town||6,732.1|
|- CDP||Bear CDP||19,371||Hockessin CDP||10.04||Wilmington Manor CDP||5,075.0|
American Indian Areas
Metropolitan and Micropolitan Statistical Areas and Related Statistical Areas
ZIP Code Tabulation Areashttp://www.census.gov/geo/www/gazetteer/files/Gaz_zcta_national.txt