The Louth Navigation was a canalisation of the River Lud. It ran for 11 miles (18 km) from Louth in Lincolnshire, England, to Tetney Haven, at the mouth of the Humber. It was authorised by act of Parliament in 1763 and completed in 1770, under the supervision of the engineer John Grundy Jr. and then by James Hoggard. Eight locks were required to overcome the difference in altitude, six of which were constructed with sides consisting of four bays.

Louth is a market town and civil parish in the East Lindsey district of Lincolnshire, England. Louth serves as an important town for a large rural area of eastern Lincolnshire. Visitor attractions include St James' Church, Hubbard's Hills, the market, many independent retailers and Lincolnshire's last remaining cattle market.