The body of a man in his 20s was found in the Coronation Channel on Saturday morning.
Lincolnshire Police say it was reported to them at 9.07am after being discovered near a bridge close to Birch Grove in Spalding.
A spokesman for the police, said: “The body of a man in his 20s was found near the railway bridge in the Coronation Channel area.
“There are no suspicious circumstances.”