List of former state routes in Ohio (271–352)

This is a list of former state routes in Ohio that were numbered between 271 and 352. These routes were at one time designated as part of the Ohio State Highway System but are no longer in service under those designations. This can be due to several reasons, including:

• Re-routing: The route may have been realigned to follow a different course, rendering the original designation obsolete.
• Decommissioning: The route may have been removed from the state highway system altogether, often becoming a county or township road. This can occur due to low traffic volume or when the road is deemed no longer essential to the state's transportation network.
• Duplication: A route may have been renumbered to eliminate duplication with another route, either within Ohio or across state lines.
• Federalization/Interstate Status: A state route may have been incorporated into a U.S. Route or Interstate Highway, thereby losing its state designation.
• Municipal Control: Segments of state routes within city limits may have been turned over to the municipalities for maintenance, leading to their removal from the state highway system and often re-designation with a local name.

Documentation regarding the exact dates of decommissioning and the specific reasons for the removal of each route is often incomplete. Historical highway maps and records from the Ohio Department of Transportation (ODOT) are the primary sources for this information.

A comprehensive list would include the route number, a brief description of its former path (including endpoints and major towns passed through), and the approximate year(s) of its existence. However, that detailed information is not contained within this general entry.