Watford () is a town and borough in Hertfordshire, England, 15 miles northwest of Charing Cross.
It is situated on the River Colne, and initially developed as a small market town until the Grand Junction Canal encouraged the construction of paper-making mills, print works, and breweries. While industry has declined in Watford, its location near to London and to good transport links has attracted several companies to site their headquarters in the town. It contains Cassiobury Park, a public park that was once the manor estate of the Earls of Essex, and Watford Football Club, a professional team who currently compete in the Championship, the second highest level of English football.
The town developed on the River Colne on land belonging to St Albans Abbey until the 16th century. During the 12th century a charter was granted allowing a market, and the building of St Mary’s Church began. The town grew partly due to travellers going to Berkhamsted Castle and the royal palace at Kings Langley. A mansion was built at Cassiobury in the 16th century. This was partly rebuilt in the 17th century and another country house was built at The Grove.