Settlement of the county began in 1727, when
Adam Miller (Mueller) staked out a claim on the south fork of the
Shenandoah River, near the line that now divides Rockingham County from
Page County. On a trip through eastern
Virginia, the German-born Miller had heard reports about a lush valley to the west which had been discovered by Governor
Alexander Spotswood's legendary
Knights of the Golden Horseshoe Expedition, and then moved his family down from
Lancaster County, Pennsylvania. In 1741, Miller purchased , including a large lithia spring, near
Elkton, Virginia, and lived on this property for the remainder of his life. Much-increased settlement of this portion of the
Colony of Virginia by Europeans began in the 1740s and 1750s. Standing between the
Tidewater and
Piedmont regions to the east in Virginia and the
Shenandoah Valley and the area beyond (known in old Virginia as the "Transmountaine") were the
Blue Ridge Mountains. Rather than cross such a formidable physical barrier, most early settlers came southerly up the valley across the Potomac River from
Maryland and
Pennsylvania. Many followed the
Great Wagon Trail, also known as the
Valley Pike (
U.S. Route 11 in modern times). Rockingham County was established in 1778 from
Augusta County. Harrisonburg was named as the
county seat and incorporated as a town in 1780. Harrisonburg was incorporated as a city in 1916 and separated from Rockingham County (all cities in Virginia are independent of any county), but it remains the county seat. The county is named for
Charles Watson-Wentworth, 2nd Marquess of Rockingham, a British statesman (1730–1782). He was Prime Minister of Great Britain twice, and a keen supporter of constitutional rights for the colonists. During his first term, he brought about the repeal of the
Stamp Act of 1765, reducing the tax burden on the colonies. Appointed again in 1782, upon taking office, he backed the claim for the independence of the
Thirteen Colonies, initiating an end to British involvement in the
American Revolutionary War. However, he died after only 14 weeks in office. By 1778, it was unusual to honor British officials in Virginia, fighting for its independence. The same year, immediately to the north of Rockingham County,
Dunmore County, named for Virginia's last Royal Governor,
John Murray, 4th Earl of Dunmore, an unpopular figure, was renamed. The new name,
Shenandoah County, used a Native American name. However, long their political supporter in the
British Parliament, the Marquess of Rockingham was a popular figure with the citizens of the new United States. Also named in his honor were
Rockingham County, New Hampshire,
Rockingham County, North Carolina, and the
City of Rockingham in
Richmond County, North Carolina. Rockingham County is the birthplace of
Thomas Lincoln, Abraham Lincoln's father. In 1979 when the Adolf Coors Brewing Company came to Rockingham County it caused an uproar; some citizens thought it would corrupt the morals of the area while others wanted the new jobs. In 2018, a series of
strikes and protests were held in
Dayton's
Cargill plant. ==Geography==