Adjacent counties

• 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

National protected area

• Bombay Hook National Wildlife Refuge

Climate

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.

Major highways

The following state highways are located in Kent County:^[12]

• 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

Railroads

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.^[13]

Public transportation

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.^[14]

Airports

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

2000 census

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/km²). There were 50,481 housing units at an average density of 86 per square mile (33/km²). 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.

2010 census

As of the 2010 census, there were 162,310 people, 60,278 households, and 42,290 families living in the county.^[25] The population density was 276.9 inhabitants per square mile (106.9/km²). There were 65,338 housing units at an average density of 111.5 per square mile (43.1/km²).^[26] 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.^[25] 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.^[27]

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.^[25]

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.^[28]

2020 census and 2021 census estimates

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.^[1]

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.

Amish community

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.^[29] 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.^[30][31][29]

Cities

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

Towns

Census-designated places

Unincorporated localities

• Andrewville
• Berrytown
• Little Heaven
• Marydel