The Market towns of Vestfold county (Norwegian: Kjøpstedene i Vestfold fylke) was an electoral district for parliamentary elections in Norway. It comprised the market towns (Norwegian: kjøpsteder) of Holmestrand, Horten, Tønsberg, Sandefjord and Larvik in Vestfold county. The district was established ahead of the 1921 Norwegian parliamentary election following the change from single member constituencies to plural member constituencies in 1919.