On July 6, the Virginia State Board of Elections determined that Matt Waters has enough valid signatures to be on the November 2018 ballot for U.S. Senate. He is the Libertarian nominee. He needed 10,000 valid signatures. The only other candidates on the ballot for U.S. Senate are the Democratic incumbent, Tim Kaine; and the Republican nominee, Corey Stewart.

The Libertarian Party has never been a qualified party in Virginia. The last qualified third party in Virginia was the Reform Party, but it lost its status in November 1997. The only states in which the Democratic and Republican Parties have been the only ballot-qualified parties continuously during the last twenty years are New Jersey, Pennsylvania, and Virginia (however, the only qualified third parties in Georgia were only qualified for statewide office, not district or county office). The problem in Virginia is that a party is defined as a group that got 10% in any statewide race in either of the last two statewide elections. Bills have been introduced repeatedly to lower the 10%, but they always fail to pass.