The A3207 is a short link road near Clapham Junction in central London.
The road starts at traffic lights on the A3036 Lavender Hill. In 1922 it started further south on the A3 (now part of the South Circular Road but keeping the A3 number) Battersea Rise but the southernmost section is now unclassified and largely closed to traffic.
The road heads north along Falcon Road and soon goes through a tunnel under Clapham Junction railway station; there is access to the station on either side. The road now zigzags before running straight to traffic lights on the A3205 Battersea Park Road, where the road ends.