County elected offices The county is divided into seven magisterial districts: Brentsville, Coles, Potomac, Gainesville, Neabsco, Occoquan, and Woodbridge. The magisterial districts each elect one supervisor to the
Board of Supervisors which governs Prince William County. There is also a chairman elected by the county
at-large, bringing total board membership to 8. A vice-chairman is selected by the board from among its membership. The county operates under the county form of the
county executive system of government, with an elected Board of Supervisors. The board appoints a professional, nonpartisan county executive to manage operations of government agencies. Christopher Shorter was named County Executive for Prince William County, Virginia, by the Board of County Supervisors in October 2022. Prior to serving as the County Executive in Prince William County, he served as the first City Administrator in the City of Baltimore, Assistant City Manager in Austin, Texas, and served for more than 10 years in various leadership roles for the District of Columbia government, including Director of the DC Department of Public Works. In other elected County offices, the Prince William County
Commonwealth's Attorney, Amy Ashworth, and the Prince William County
Clerk of Circuit Court, Jacqueline Smith are Democrats. The Prince William
County Sheriff, Glen Hill, is a Republican.
State elected offices Republicans formerly held six of the eight
Virginia House of Delegates seats that include parts of the county, with that delegation having consisted of
Robert G. Marshall,
Scott Lingamfelter,
Tim Hugo,
Jackson Miller,
Rich Anderson, and
Mark Dudenhefer. In the
2017 legislative election, which saw the Democrats cut a Republican majority in the House of Delegates from 66 to 51, Prince William County saw its number of Republican Delegates be reduced from six to one, with Tim Hugo being the sole Republican to represent the county. Marshall, Lingamfelter, Miller, and Anderson all ran for reelection and were defeated by Democratic challengers
Danica Roem,
Elizabeth Guzmán,
Lee Carter, and
Hala Ayala respectively. Dudenhefer opted to retire and instead successfully ran for a seat on the
Stafford County Board of Supervisors, and he was replaced by Democrat
Jennifer Carroll Foy. Democrats
Luke Torian and
John Bell were already representing the county in the House at the time of the 2017 elections, and with the addition of the five newcomers, Democrats held seven of the eight House seats that include parts of Prince William County. Hugo was then defeated in the
2019 election by Democrat
Dan Helmer. In the
2025 election, former delegate Elizabeth Guzmán defeated the last Republican delegate from Prince William county in the House,
Ian Lovejoy. Democrats now hold all seven house seats that include parts of the county. All three
Virginia State Senate seats that include parts of the county are held by Democrats.
National politics Democrats hold both of the U.S. Congressional seats that include parts of Prince William County. In 2006, Democratic U.S. Senator candidate
Jim Webb carried the county with 50.51% of the vote. In the
2008 United States presidential election, Democrat
Barack Obama carried Prince William with 57.51% of the vote, compared to Republican
John McCain who received 41.62%. Obama's final rally the night before the election was held at the Prince William County Fairgrounds, just outside the city of Manassas. He was the first Democrat to carry the county since 1964. Continuing demographic changes in the county, such as an increasingly diverse and urbanized population, were cited by
The New York Times as contributing to Obama's success in the
2012 United States presidential election and suggesting the future appeal of the Democratic Party in the United States. Between 2000 and 2010, county population had increased by 121,189 persons (43.2%). It had changed from a primarily white, rural county. Prince William by 2012 had an educated professional population with the seventh-highest income in the country; it is the first county in Virginia to be composed of a majority of minorities:
Hispanic, African American, and Asian. Obama and the Democrats attracted their votes.
Time identified Prince William as one of five critical counties in Virginia for the election. Obama defeated Romney soundly by 16 percentage points with a margin of 57%–41%, narrowly beating his 2008 margin. The county continued its trend toward Democratic candidates in the
2016 United States presidential election, Prince William County voted 57.6% for Hillary Clinton to Trump's 36.5%. Clinton's victory represented the largest margin of victory for any presidential candidate in the county since 1988. In 2020, Prince William County voted for
Joe Biden with 62.6% of the vote, the largest share of the vote for a Democratic candidate since 1944. The county has been a focal point for
right-wing conspiracy theories about illegitimate votes during the 2020 presidential election. Virginia conservatives cited the prosecution of Prince William County's former top election official, Michele White, for alleged vote count fraud in 2020 as evidence of election fraud concerns. However, the case was dropped, and it was revealed that the errors in vote tabulation actually favored
Trump, with no evidence of intentional fraud or significant impact on election outcomes. ==Museums==