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Source: Ray Sterner, Color Landform Atlas of the United States
There are 95 counties now existing in Virginia. The General Assembly has created subordinate county and city jurisdictions for nearly 400 years, and other counties have been dissolved, converted into cities, or lost to the Northwest Territory, Pennsylvania, Kentucky, and West Virginia. Several of the remaining 95 counties once had different names, and every remaining county has had its boundaries altered at one time or another.
Colony-wide government came first, starting with governance at Jamestown by a private joint-stock company. The Virginia Company initiated the Virginia legislature in 1619. The General Assembly established four "incorporations," and starting in 1634 created the counties.1
Forming new units of government with county courts helped the legislators offload to others some of the responsibilities/workload for handling land ownership changes, processing wills, and dealing with minor crimes. Similarly, creating parishes with vestry for Anglican churches helped offload the burden of providing social services for the destitute, assigning responsibility for illegitimate children, etc.
After 1634, each county was authorized to elect two members to the General Assembly. Those members sat in the House of Burgesses, once it began to meet as a separate body in 1643. The process mimicked how the 40 counties in England sent two members each to the House of Commons.
Up to the American Revolution, the expansion of political authority roughly matched the migration of colonists inland:2
The counties did not unite to create Virginia; the state was not created by a vote of independent counties. Instead, the legislature of Virginia created the counties from the top down.
That is a key distinction between the formation of Virginia vs. formation of the Federal government. The US Congress and then an entire structure of Federal government were created from the bottom up. The first 13 states coordinated with each other "in Congress assembled" to unite into one nation.
The only authorities held by local jurisdictions were granted by the legislature. Local governments lack power to make decisions as challenging as land use planning, or as simple as hiring dogcatchers, unless the jurisdiction can identify a specific grant of authority from the General Assembly. Virginia courts interpret the grant of authority according to the Dillon Rule.
Three counties (Chesterfield, James City, and Roanoke) have specific charters from the General Assembly that spell out specific authorities. The rest are empowered to exercise governmental authority based on Title 15.2 of the Code of Virginia.3
the number has changed over time, but Virginia has 95 counties now
Source: Virginia Department of Education, History and Social Science Standards of Learning (p.8)
The state constitution that went into effect in 1870 established an almost-unique status for Virginia's cities; they are independent from surrounding counties. County residents do not vote in elections for city councils. Within city boundaries, county officials have no responsibility for setting tax rates, zoning land, planning roads, or managing schools. Separate courts handle cases in almost every one of Virginia's 38 cities.
In contrast, towns within Virgia counties remain part of the county. Town residents vote for county supervisors and pay county taxes, as well as vote for town officials and pay town taxes. Town children attend schools managed by county officials. Town officials do have responsibility for land use planning, and with revenue raised from town taxes may hire extra police and offer extra services to town residents.
Some counties and cities share the same name, often confusing people unfamiliar with the independent status of cities. There is a City of Richmond/Richmond County, City of Roanoke/Roanoke County, a City of Fairfax/Fairfax County, and a City of Franklin/Franklin County. Alexandria County changed its name to Arlington County in 1920, to reduce confusion with the City of Alexandria.
There are also counties that share the same name as a town, such as Town of Wise/Wise County. The City of Bedford, which was surrounded by Bedford County, reverted to being a town in 2013.
The confusing status created concerns in 2020. In the campaign for the presidential election that year, President Trump claimed that voting by mail would lead to a fraudulent election and the use of mail-in ballots became a partisan issue. The Center for Voter Information, a non-government organization, mailed out applications for Northern Virginia voters to request absentee ballots, but its printer in Philadelphia included a City of Fairfax return address for the Fairfax County requests. In Roanoke County, return envelopes were addressed to the City of Roanoke election office, Within the city, return envelopes were addressed to the county's election office.4
a non-government organization mixed up city and county election offices, when it distributed mail-in ballot applications in 2020
Source: State Sen. Scott Surovell, Facebook post (August 6, 2020)
The last county to be created in Virginia was in Southwest Virginia, which experienced a surge of population growth as the expansion of the railroad network finally make it possible to ship timber and coal to market. Dickenson County was created in 1880.5
in 1848, before railroads were built, southwestern Virginia had few residents and fewer counties than today
Source: Library of Congress, A map of the internal improvements of Virginia (by Claudius Crozet, 1848)
during the Civil War, historic legal records were destroyed at many Virginia courthouses, including the one in Fairfax County
Source: National Archives, Fairfax Court House, Virginia, ca. 1860 - ca. 1865