Virginia's 31st House of Delegates district election, 2007, held November 6, 2007, was a contest between incumbent Republican Scott Lingamfelter and Democratic challenger Bill Day, a part-time psychotherapist, in the 2007 general election which was scheduled for October 6. Day began sending out mass mailings shortly after Labor Day introducing himself to the voters, and in October began sending out negative advertisements against Lingamfelter, accusing him of being aligned with southern Virginia Republicans who were failing to address northern Virginia traffic congestion.