Frederick County is located in the northern part of the U.S. state of Maryland. As of the 2010 U.S. Census, the population was 240,336. The county seat is Frederick.
According to the U.S. Census Bureau, the county has a total area of 667 square miles (1,730 km), of which 660 square miles (1,700 km) is land and 7.2 square miles (19 km) (1.1%) is water. It is the largest county in Maryland in terms of land area.
Frederick County straddles the boundary between the Piedmont Plateau Region and the Appalachian Mountains. The county’s two prominent ridges, Catoctin Mountain and South Mountain, form an extension of the Blue Ridge. The Middletown Valley lies between them.
Attractions in the Frederick area include the Clustered Spires, a monument to Francis Scott Key, the National Museum of Civil War Medicine, Monocacy National Battlefield and South Mountain battlefields, and the Schifferstadt Architectural Museum.
Frederick County has experienced a rapid increase in population in recent years, including that of minority groups.
The summary statistics for Frederick County from the 2000 U.S. Census are provided to compare and contrast with the more current data from the 2010 Census. The following table includes the total persons, sex and self-designated ethnicity based on 2000 Census; additional details are archived at the Maryland State Government website.
2000 Census total population: 195,277
Male: 96,079 (49.2%)
Female: 99,198 (50.8%)
Ethnicity as percent total population:
White: 176,965 (90.6%)
Black or African American: 13,605 (7.0%)
American Indian and Alaskan: 1,083 (0.6%)
Asian: 4,066 (2.1%)
Native Hawaiian and Other Pacific Islander: 156 (0.1%)
Some other ethnicity: 2,434 (1.2%)
The total (all races) of those self-identifying as Hispanic or Latino origin made up 2.4%, and those persons who were white alone made up 88.1%.
As of the 2010 United States Census, there were 233,385 people, 84,800 households, and 61,198 families residing in the county. The population density was 353.5 inhabitants per square mile (136.5/km). There were 90,136 housing units at an average density of 136.5 per square mile (52.7/km). The racial makeup of the county was 81.5% white, 8.6% black or African American, 3.8% Asian, 0.3% American Indian, 2.9% from other races, and 2.8% from two or more races. The total (all races) of those self-identifying as Hispanic or Latino origin made up 7.3%, and those persons who were white alone made up 77.8% of the population. In terms of ancestry, 26.3% were German, 17.4% were Irish, 12.1% were English, 7.2% were Italian, and 6.3% were American.
Of the 84,800 households, 37.6% had children under the age of 18 living with them, 57.8% were married couples living together, 10.0% had a female householder with no husband present, 27.8% were non-families, and 22.0% of all households were made up of individuals. The average household size was 2.70 and the average family size was 3.17. The median age was 38.6 years.
The median income for a household in the county was $81,686 and the median income for a family was $95,036. Males had a median income of $62,494 versus $46,720 for females. The per capita income for the county was $35,172. About 3.2% of families and 4.8% of the population were below the poverty line, including 5.8% of those under age 18 and 5.6% of those age 65 or over.
The United States Census Bureau estimates Frederick County’s population at 245,322, marking a 5.1% increase since 2010. The racial makeup was estimated to be the following in 2014: 75% White (47.0% Non-Hispanic White), 9.7% Black, 4.6% Asian, 0.5% Native American, 0.1% Native Hawaiian or Pacific Islander, 2.8% Two or more races, and 8.7% were Hispanic or Latino, of any race.