Cat Hill Tunnel was a railway tunnel that ran through Darfield, South Yorkshire, England, leading to Darfield railway station (now closed).
The tunnel was built by George Stephenson for the North Midland Railway opened in 1840.
Steps that led to Darfield station may be found beyond the western abutment.
The remains of Darfield station can be found at its former Doncaster Road site.
The original station was built 45 chains to the south at the Cathill Road site near to Broomhill in 1840.