The administrative seat is located in Tønsberg and the county mayor is Anne Strømøy of the Conservative Party and the chief administrative officer for the county municipality is Toril Eeg.

[1] The main responsibilities of the county municipality includes the governing of ten upper secondary schools with about 8,500 pupils in addition to Skiringssal Folk High School.

[2] The Vestfold county council (Norwegian: Fylkestinget) is made up of 39 representatives that are elected every four years.

The council essentially acts as a Parliament or legislative body for the county and it meets several times each year.

The council is divided into standing committees and an executive board (fylkesutvalg) which meet considerably more often.