Cincinnati Subway

Cincinnati Subway
Overview
OwnerSORTA
LocaleCincinnati, Ohio
Transit typeRapid transit
Number of lines1
Number of stations4
Operation
Began operationNever completed
Technical
System length2.2 mi (3.5 km)
System map

Oakley
(Proposal)
Eastern half of incomplete loop
Forest Avenue
(Proposal)
Former Zumbiel Packaging tunnel
Montgomery Avenue
(Proposal)
Former Section Avenue tunnel
St. Bernard
(Proposal)
Clifton Avenue
(Demolished)
Ludlow Avenue
(Demolished)
Current Hopple Street tunnel
Marshall Avenue
(Demolished)
Current Central Parkway tunnel
Brighton
(Abandoned)
Linn Street
(Abandoned)
Liberty Street
(Abandoned)
Race Street
(Abandoned)
Stub for incomplete wye
Walnut Street stubs for incomplete loop

Modification H – Constructed
Modification H – Funded

The Cincinnati Subway is a partially completed rapid transit system beneath the streets of Cincinnati, Ohio. Although the system only grew to a little more than 2 miles (3.2 km) in length, its derelict tunnels and stations make up the largest abandoned subway tunnel system in the United States. Construction began in the early 1900s as an upgrade to the Cincinnati streetcar system, but was abandoned due to escalating costs, the collapse of funding amidst political bickering, auto industry lobbying against public transit projects, and the Great Depression during the 1920s and 1930s.

In 1928, the construction of the subway system in Cincinnati was indefinitely canceled. As of 2025, there are no plans to revive the project.