The River Stort is a river in Essex and Hertfordshire, England. It is 24 miles (38 km) long and flows from just south of the village of Langley to the River Lea at Hoddesdon.
From Langley, the Stort flows in a generally southerly direction through the villages of Clavering and Manuden and the market town of Bishop's Stortford, from which it took its name in the 16th century.
It then flows past Sawbridgeworth, before it changes direction and flows west past Harlow and Roydon. It finally empties into the Lea at Feildes Weir, Hoddesdon. This 14-mile (22-km) long section was canalised in the 18th century as the Stort Navigation.