[2] Harford County is included in the Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area.

[3]: 14–15  In 1652, the English and Susquehannocks signed a treaty at what is now Annapolis for the area now called Harford County.

[3]: 13, 60  On March 22, 1775, Harford County hosted the signers of the Bush Declaration, a precursor document to the American Revolution.

[3]: 67 Havre de Grace, a city incorporated in 1785 within Harford County, was once under consideration to be the capital of the United States rather than Washington, D.C.[3]: 250  It was favored for its strategic location at the top of the Chesapeake Bay; this location would facilitate trade while being secure in time of war.

[4] Today, the waterways around Havre de Grace have become adversely affected by silt runoff, which is one of the primary environmental issues of Harford County.

[5] While today the site is a Maryland National Guard military reservation, the land was used as the Havre de Grace Racetrack where racehorse Man o' War ran in 1919 and 1920.

[6] During the 1900s the Bata Shoe Company employed numerous Eastern European refugees at the Belcamp factory.

[9] On the County Health Rankings & Roadmaps by the Robert Wood Johnson Foundation with the University of Wisconsin Population Health Institute, "prior to the 2016 report ... Harford's yearly rankings[10] typically fell between ninth and 10th place, primarily because of the percentage of county residents who were obese or who smoked.

"[11] Scenes from Tuck Everlasting, From Within, and House of Cards were all filmed in Harford County.

[12] The county was named for Henry Harford (c. 1759–1834), the illegitimate son of Frederick Calvert, 6th Baron Baltimore.

Harford served as the last Proprietary Governor of Maryland but, because of his illegitimacy, did not inherit his father's title.

[13] Harford County has environmental issues in three major areas: land use, water pollution/urban runoff, and soil contamination/groundwater contamination.

As the county sits at the headwaters of the Chesapeake Bay along the Susquehanna River, it plays a key role in controlling sediment and fertilizer runoff into the bay as well as fostering submerged aquatic vegetation (SAV) regrowth.

The landfill, approved to triple in size in 2007, is the subject of complaints by neighbors of operating violations, such as large areas of open trash and blown litter; leachate breaks which contaminate area residential wells and flow into Deer Creek, a tributary of the Susquehanna River; and increased health problems.

[18] 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.

[20] Harford County is, like the Pennsylvania Dutch Country to its north, a strongly Republican region.

[citation needed] Harford County was granted a charter form of government in 1972.

The Maryland State Police also have a barrack located in Bel Air which serves the citizens of Harford County.

Tony "G" Giangiordano represents district C which includes Bel Air and Forest Hill.

Jacob D. Bennett represents district F which includes Belcamp and Havre de Grace.

As of the 2010 United States Census, there were 244,826 people, 90,218 households, and 66,335 families residing in the county.

[42] Also at HCC is the Hays-Heighe House, a museum dedicated to the history of Harford County.

The list of sports teams and organizations are shown below: Harford County is the hometown of many sports icons, including Kimmie Meissner, a 2006 Olympic figure skating competitor, Cal Ripken, a former Baltimore Orioles Hall of Famer and former Minnesota Vikings linebacker EJ Henderson.

Its available for recreational pilots & flight training, as well as sight seeing, balloon rides, hang gliding and sky diving.

Harford Community College, located in Churchville, offers 2-year associate degrees and vocational programs.

WHGM at 1330 AM/104.7 FM licensed toHavre De Grace follows the format of Adult hits.