Devonshire Tunnel is on the closed Somerset & Dorset Joint Railway main line, between Midford and Bath Green Park railway stations, below high ground and the southern suburbs of Bath, England, emerging below the northern slopes of Combe Down village. It opened in 1874 and was named after the road called Devonshire Buildings which lie immediately above the tunnel.

Devonshire Tunnel

Devonshire Tunnel West Portal
Overview
Line	Somerset & Dorset Joint Railway
Location	c. 2.0 miles from Bath Green Park
OS grid reference	ST 746 634
Operation
Opened	1874
Closed	1966 (railway)
Owner	Wessex Water
Technical
Length	447 yards (409 m) approx.
No. of tracks	Single
Grade	mostly 1 in 50 (2%) ascending towards Midford (away from Bath)[1]

It now forms one of the eponymous tunnels in the Two Tunnels Greenway.