Tadcaster is a market town and civil parish in the Selby district of North Yorkshire, England, 3 miles (5 km) east of the Great North Road, 12 miles (19 km) north-east of Leeds, and 10 miles (16 km) south-west of York. Its historical importance from Roman times onward was largely as the lowest road crossing-point on the River Wharfe until the construction of the A64 Tadcaster by-pass some 660 yards (600 m) to the south, in 1978. There are two rail crossings downstream of the town before the Wharfe joins the River Ouse near Cawood. Tadcaster is twinned with Saint-Chély-d'Apcher in France.