Harford County is a county in the U.S. state of Maryland. As of the 2010 census, the population was 244,826. Its county seat is Bel Air. Harford County is included in the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area, which is also included in the Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area.
According to the U.S. Census Bureau, the county has a total area of 527 square miles (1,360 km), of which 437 square miles (1,130 km) is land and 90 square miles (230 km) (17%) is water.
Harford County straddles the border between the rolling hills of the Piedmont Plateau and the flatlands of the Atlantic Coastal Plain along the Chesapeake Bay and its tributaries. The county’s development is a mix of rural and suburban, with denser development in the larger towns of Aberdeen and Bel Air and along Route 40 and other major arteries leading out of Baltimore. The highest elevations are in the north and northwest of the county, reaching 805 ft. near the Pennsylvania border in the county’s northwestern corner. The lowest elevation is sea level along the Chesapeake Bay.
As of the census of 2000, there were 218,590 people, 79,667 households, and 60,387 families residing in the county. The population density was 496 people per square mile (192/km²). There were 83,146 housing units at an average density of 189 per square mile (73/km²). The racial makeup of the county was 86.77% White, 9.27% African-American, 0.23% Native American, 1.52% Asian, 0.06% Pacific Islander, 0.69% from other races, and 1.47% from two or more races. 1.91% of the population were Hispanic or Latino of any race. 22.5% were of German, 13.1% Irish, 9.8% Italian, 9.2% English, 8.1% “American” and 6.0% Polish ancestry.
By 2006 the population of Harford County had risen 10.4% to 241,402.
The 2005 report on race and ethnicity indicated the county’s population was 82.8% non-Hispanic whites. The proportion of African-Americans in the county had risen to 11.5%. Hispanics were now 2.4% of the total population.
In 2000 there were 79,667 households out of which 38.70% had children under the age of 18 living with them, 61.90% were married couples living together, 10.20% had a female householder with no husband present, and 24.20% were non-families. 19.70% of all households were made up of individuals and 6.80% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 3.14.
In the county, the age distribution of the population shows 27.90% under the age of 18, 6.80% from 18 to 24, 31.60% from 25 to 44, 23.70% from 45 to 64, and 10.10% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 96.00 males. For every 100 females age 18 and over, there were 92.50 males.
The median income for a household in the county was $57,234, and the median income for a family was $63,868. Males had a median income of $43,612 versus $30,741 for females. The per capita income for the county was $24,232. About 3.60% of families and 4.90% of the population were below the poverty line, including 5.80% of those under age 18 and 6.70% of those age 65 or over.
As of the 2010 United States Census, there were 244,826 people, 90,218 households, and 66,335 families residing in the county. The population density was 560.1 inhabitants per square mile (216.3/km). There were 95,554 housing units at an average density of 218.6 per square mile (84.4/km). The racial makeup of the county was 81.2% white, 12.7% black or African American, 2.4% Asian, 0.3% American Indian, 0.1% Pacific islander, 0.9% from other races, and 2.5% from two or more races. Those of Hispanic or Latino origin made up 3.5% of the population. In terms of ancestry, 28.1% were German, 19.8% were Irish, 12.2% were English, 9.9% were Italian, 6.8% were Polish, and 6.2% were American.
Of the 90,218 households, 36.6% had children under the age of 18 living with them, 57.9% were married couples living together, 11.3% had a female householder with no husband present, 26.5% were non-families, and 21.5% of all households were made up of individuals. The average household size was 2.68 and the average family size was 3.13. The median age was 39.4 years.
The median income for a household in the county was $77,010 and the median income for a family was $88,370. Males had a median income of $59,734 versus $44,706 for females. The per capita income for the county was $33,559. About 4.0% of families and 5.6% of the population were below the poverty line, including 7.3% of those under age 18 and 5.9% of those age 65 or over.