Kent County is a county located in the central part of the U.S. state of Delaware. As of the 2020 census, the population was 181,851, making it the least populous county in Delaware. The county seat is Dover, the state capital of Delaware. It is named for Kent, an English county.

Kent County comprises the Dover metropolitan area, which is included in the Philadelphia-Reading-Camden, PA-NJ-DE-MD combined statistical area.

In about 1670 the English began to settle in the valley of the St. Jones River, earlier known as Wolf Creek. On June 21, 1680, the Duke of York chartered St. Jones County, which was carved out of New Amstel/New Castle and Hoarkill/Sussex counties. St. Jones County was transferred to William Penn on August 24, 1682, and became part of Penn's newly chartered Delaware Colony.

Penn ordered a court town to be laid out, and the courthouse was built in 1697. The town of Dover, named after the town of Dover in England's Kent, was finally laid out in 1717, in what was then known as the Lower Counties. It was designated as the capital of Delaware in 1777. In 1787 Delaware was first state to ratify the U.S. Constitution, and became "the First State." Through much of the late 18th century, the economy of Kent County was based on small grain farms. As a result, farmers did not need as many slaves as did owners of tobacco plantations. Delaware had a high proportion of free blacks among its African-American population by the early 19th century.

In the 1960s, Dover was a center of manufacturing of spacesuits worn by NASA astronauts in the Apollo moon flights by ILC Dover, now based in the small town of Frederica. The suits, dubbed the "A7L," was first flown on the Apollo 7 mission in October 1967, and was the suit worn by Neil Armstrong and Buzz Aldrin on the Apollo 11 mission. The company still manufactures spacesuits to this day—the present-day Space Shuttle "soft" suit components (the arms and legs of the suit).

According to the U.S. Census Bureau, the county has a total area of 798 square miles (2,070 km), of which 586 square miles (1,520 km) is land and 212 square miles (550 km) (26.6%) is water.

Kent County, like all of Delaware's counties, is subdivided into Hundreds. There are several explanations given for how the Hundreds were arrived at, either being an area containing 100 families, an area containing 100 people, or an area that could raise 100 militiamen. Kent County was originally apportioned into six Hundreds: Duck Creek, Little Creek, Dover, Murderkill, Milford and Mispillion. In 1867, the Delaware legislature split Murderkill Hundred into North Murderkill Hundred and South Murderkill Hundred. In 1869, the legislature formed Kenton Hundred from parts of Little Creek and Duck Creek Hundred. Today the county contains eight Hundreds.

• New Castle County - north
• Salem County, New Jersey - northeast
• Cumberland County, New Jersey - east
• Cape May County, New Jersey - east
• Sussex County - south
• Caroline County, Maryland - southwest
• Queen Anne's County, Maryland - west
• Kent County, Maryland - northwest

• Bombay Hook National Wildlife Refuge

Kent County has a humid subtropical climate (Cfa) according to the Köppen climate classification. The Trewartha climate classification considers the climate oceanic (Do) because only seven months average above 50 °F (above 10 °C.) All months average above freezing and Dover has three months averaging above 22 °C (72 °F). The hardiness zone is 7b. [1]

The following state highways are located in Kent County:

• US 13
• US 113
• DE 1
• DE 6
• DE 8
• DE 9
• DE 10
• DE 11
• DE 12
• DE 14
• DE 15
• DE 16
• DE 42
• DE 44
• DE 300

The Delmarva Central Railroad operates two freight lines through Kent County. The Delmarva Subdivision runs north–south along the US 13 corridor through Farmington, Harrington, Felton, Wyoming, Dover, Cheswold, and Clayton and the Indian River Subdivision branches from the Delmarva Subdivision at Harrington and runs east to Houston and Milford along the DE 14 corridor. There is no passenger rail service in the county.

DART First State operates bus service within Kent County. There are several local bus routes that serve the Dover area. In addition, DART First State operates inter-county service to Wilmington, Newark, Georgetown, and Lewes, along with seasonal service to Lewes and Rehoboth Beach.

Kent County contains the following public-use and military airports:

• Chandelle Estates Airport in Dover
• Chorman Airport in Farmington
• Dover Air Force Base in Dover
• Delaware Airpark in Cheswold
• Henderson Aviation Airport in Felton
• Jenkins Airport in Wyoming
• Smyrna Airport in Smyrna

United States presidential election results for Kent County, Delaware

Year	Republican		Democratic		Third party(ies)
	No.	%	No.	%	No.	%
2024	42,458	48.09%	44,222	50.09%	1,609	1.82%
2020	41,009	47.12%	44,552	51.19%	1,464	1.68%
2016	36,991	49.50%	33,351	44.63%	4,387	5.87%
2012	32,135	46.79%	35,527	51.73%	1,018	1.48%
2008	29,827	44.57%	36,392	54.38%	706	1.05%
2004	31,578	56.40%	23,875	42.64%	538	0.96%
2000	24,081	49.90%	22,790	47.23%	1,383	2.87%
1996	15,932	40.59%	18,327	46.69%	4,993	12.72%
1992	15,562	38.67%	15,364	38.18%	9,312	23.14%
1988	19,923	60.17%	12,996	39.25%	194	0.59%
1984	21,531	64.46%	11,789	35.29%	83	0.25%
1980	14,882	49.84%	12,884	43.15%	2,096	7.02%
1976	12,604	42.83%	16,523	56.15%	301	1.02%
1972	17,712	62.03%	10,463	36.64%	381	1.33%
1968	11,082	44.53%	9,055	36.38%	4,751	19.09%
1964	9,006	40.84%	12,981	58.86%	67	0.30%
1960	10,697	49.49%	10,754	49.75%	165	0.76%
1956	10,303	52.18%	9,319	47.20%	123	0.62%
1952	10,144	50.45%	9,874	49.10%	90	0.45%
1948	8,501	50.63%	8,174	48.68%	115	0.68%
1944	7,069	47.05%	7,900	52.58%	57	0.38%
1940	8,079	46.69%	9,226	53.31%	0	0.00%
1936	7,389	43.45%	9,588	56.38%	28	0.16%
1932	6,597	42.59%	8,829	57.00%	64	0.41%
1928	8,335	59.16%	5,727	40.65%	27	0.19%
1924	6,894	49.17%	6,936	49.47%	192	1.37%
1920	6,511	46.88%	7,211	51.92%	167	1.20%
1916	3,813	47.14%	4,210	52.05%	66	0.82%
1912	3,192	40.22%	4,071	51.30%	673	8.48%

Kent County is governed by the Kent County Levy Court, which consists of seven members, six of whom are elected by district and the seventh who is elected at-large. The current members of the Kent County Levy Court are:

• Joanne Masten (D) - 1st district
• Jeffrey W. Hall (D) - 2nd district
• Allan F. Angel (D) - 3rd district (Vice President)
• Robert J. Scott - 4th district
• George Jody Sweeney (D) - 5th district
• Paul Hertz - 6th district
• Terry L. Pepper (D) - At-Large (President)

The county row offices are held by:

• Eugenia Thornton - Recorder of Deeds
• Harold K. Brode (D) - Register of Wills
• Brenda A. Wootten (D) - Clerk of the Peace
• Norman Barlow - Sheriff

Politically, Kent County is a swing county in local, state, and federal elections. The county is often used in state politics to determine a party or candidate's strength in statewide elections and is often considered a bellwether county, having voting for the winner of the national presidential election in 17 out of the last 19 presidential elections.

In the 2016 general elections, Republican Presidential Nominee Donald Trump won Kent County with 49.81% of the vote compared to Democratic Nominee Hillary Clinton's 44.91% out of 74,260 votes cast. In the 2016 Delaware Gubernatorial Election, Democratic nominee John Carney won 49.68% of the vote compared to Republican Colin Bonini's 48.05%.

In the 2020 presidential election, Delaware native Joe Biden took 51.19% of the vote compared to Trump's 47.12%, out of 87,025 votes cast. Trump lost the county in 2024, making him the first Republican in 100 years to win the presidency without the county.

In the Delaware General Assembly, 8 of the 41 seats in the Delaware State House of Representatives. As of March 2020, Democrats held 4 seats and Republicans held 4 seats. In the Delaware State Senate, 5 senate districts represent parts of Kent County. As of March 2020 there were 3 Republican seats and 2 Democratic seats.

Kent County Voter Registration and Party Affiliations as of March 30, 2020
Political Party		Total Voters	Percentage
	Democratic	55,270	43.34%
	Republican	38,073	29.85%
	No Party	31,763	24.91%
	Third Parties	2,411	1.90%
Total		127,517	100.00%

Historical population

Census	Pop.	Note	%±
1790	18,920		—
1800	19,554		3.4%
1810	20,495		4.8%
1820	20,793		1.5%
1830	19,913		−4.2%
1840	19,872		−0.2%
1850	22,816		14.8%
1860	27,804		21.9%
1870	29,804		7.2%
1880	32,874		10.3%
1890	32,664		−0.6%
1900	32,762		0.3%
1910	32,721		−0.1%
1920	31,023		−5.2%
1930	31,841		2.6%
1940	34,441		8.2%
1950	37,870		10.0%
1960	65,651		73.4%
1970	81,892		24.7%
1980	98,219		19.9%
1990	110,993		13.0%
2000	126,697		14.1%
2010	162,310		28.1%
2020	181,851		12.0%
2023 (est.)	189,789		4.4%
U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2020

As of the census of 2000, there were 126,697 people, 47,224 households, and 33,623 families living in the county. The population density was 215 people per square mile (83 people/km). There were 50,481 housing units at an average density of 86 per square mile (33/km). The racial makeup of the county was 73.49% White, 20.66% Black or African American, 0.64% Native American, 1.69% Asian, 0.04% Pacific Islander, 1.27% from other races, and 2.22% from two or more races. 3.21% of the population were Hispanic or Latino of any race. 13.3% were of German, 11.3% United States or American, 10.9% Irish, 10.0% English and 5.4% Italian ancestry. 92.5% spoke English and 3.3% Spanish as their first language.

There were 47,224 households, out of which 35.50% had children under the age of 18 living with them, 52.90% were married couples living together, 13.80% had a female householder with no husband present, and 28.80% were non-families. 23.00% of all households were made up of individuals, and 8.40% had someone living alone who was 65 years of age or older. The average household size was 2.61 and the average family size was 3.06.

In the county, the population was spread out, with 27.30% under the age of 18, 10.10% from 18 to 24, 29.80% from 25 to 44, 21.20% from 45 to 64, and 11.70% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 93.10 males. For every 100 females age 18 and over, there were 89.60 males.

The median income for a household in the county was $40,950, and the median income for a family was $46,504. Males had a median income of $32,660 versus $24,706 for females. The per capita income for the county was $18,662. About 8.10% of families and 10.70% of the population were below the poverty line, including 14.80% of those under age 18 and 8.80% of those age 65 or over.

As of the 2010 census, there were 162,310 people, 60,278 households, and 42,290 families living in the county. The population density was 276.9 inhabitants per square mile (106.9/km). There were 65,338 housing units at an average density of 111.5 per square mile (43.1/km). The racial makeup of the county was 67.8% white, 24.0% black or African American, 2.0% Asian, 0.6% American Indian, 0.1% Pacific islander, 2.0% from other races, and 3.5% from two or more races. Those of Hispanic or Latino origin made up 5.8% of the population. In terms of ancestry, 17.5% were German, 15.4% were Irish, 11.5% were English, 7.2% were Italian, and 5.9% were American.

Of the 60,278 households, 35.6% had children under the age of 18 living with them, 50.1% were married couples living together, 14.9% had a female householder with no husband present, 29.8% were non-families, and 23.6% of all households were made up of individuals. The average household size was 2.62 and the average family size was 3.09. The median age was 36.6 years.

The median income for a household in the county was $53,183 and the median income for a family was $60,949. Males had a median income of $43,418 versus $35,603 for females. The per capita income for the county was $24,194. About 9.3% of families and 12.5% of the population were below the poverty line, including 21.0% of those under age 18 and 7.7% of those age 65 or over.

As of the 2020 census, there were 181,851 people living in the county; according to the 2021 American Community Survey, its racial makeup was 58.8% non-Hispanic white, 28.4% Black or African American, 0.8% Native American, 2.4% Asian, 0.1% Pacific Islander, 4.1% multiracial, and 7.8% Hispanic or Latino of any race.

In 2021, there were 66,720 households and an average of 2.63 people per household. Among its population, 88.2% were living in the same residency one year ago. The median household income for the county was $63,715; the county had a per capita income of $30,804. An estimated 12.2% of the population lived at or below the poverty line.

Kent County is home to an Amish community residing to the west of Dover, consisting of 9 church districts and about 1,650 people. The Amish first settled in Kent County in 1915 after migrations from Wisconsin, Montana, Alabama, and Ohio. The area is home to several Amish businesses selling items such as Amish food, furniture, quilts, and handmade crafts. Every September, the Amish Country Bike Tour, one of the largest cycling events in Delaware, takes place in the area. In recent years, increasing development has led to the decline in the number of Amish living in the community.

• Dover
• Harrington
• Milford (partly in Sussex County)

• Andrewville
• Berrytown
• Little Heaven
• Marydel

School districts include:

• Caesar Rodney School District
• Capital School District
• Lake Forest School District
• Milford School District
• Smyrna School District
• Woodbridge School District

Tertiary institutions:

• Delaware State University (DSU)

Wesley College merged into DSU in 2021.

• National Register of Historic Places listings in Kent County, Delaware

• Kent County webpage - Archived
• Kent County & Greater Dover Convention and Visitors Bureau

39°06′N 75°30′W / 39.10°N 75.50°W / 39.10; -75.50