Online Mapping System

The Online Mapping System is a GIS web application designed to provide qualified professionals with instant access to State Historic Preservation Office data. The intention of this site is to promote the utility of GIS and spatial data as decision support tools for federal undertakings subject to Section 106 of the National Historic Preservation Act and for scholarly research on Ohio history, architecture and archaeology. Subscribers to the Online Mapping System have the right to view and obtain information about cultural resources in Ohio and the responsibility to protect spatial information on sensitive archaeological and historic resources.

Features:

  • View, query and export Ohio SHPO GIS Data
  • Create customized maps
  • Export data to shapefile or excel
  • Enhanced Survey123 form submission capabilities

Available data includes:

  • National Register of Historic Places (all listings as points)
  • National Register Historic Districts (all districts as polygons)
  • Ohio Historic Inventory
  • Ohio Archaeological Inventory
  • Previously Surveyed Areas
  • Ohio SHPO Determinations of Eligibility
  • Cemeteries
  • Remarkable Ohio Markers (points and link to related data)
  • Federal Tax Credit Projects
  • Historic Bridges
  • Ohio's World Heritage Sites

View a Complete List of Available Data

Map of Ohio

Key Updates:

  • Paid Subscription Access:
    Due to updates in our network and security protocols, OMS now requires a paid subscription for access.
  • New Record Request Procedures:
    Cultural resource forms (e.g., Ohio Archaeological Inventory forms, Ohio Historic Inventory forms, National Register nominations, and Determination of Eligibility documentation) are no longer available through the OMS. The free data search request process was discontinued as of 8 a.m. on Friday, March 28, 2025.

OMS Subscription Pricing:

  • Consultant Access (12 months): $200/user (View-Access and Enhanced Survey123 form submission)
  • Agency/Non-Profit/Academic Access (12 months):
    • $52/user (View Access)
    • $104/user (View-Access and Enhanced Survey123 form submission)

OMS Registration Process:

All users (new and returning) are required to apply for an individual user account. Each application will be reviewed, and upon approval

Register for an OMS Account

Record Requests:

Downloadable data available through the OMS is limited to shapefile and tabular data only. Full records (such as complete Ohio Archaeological Inventory forms, Ohio Historic Inventory forms, National Register nominations, Determination of Eligibility documentation, and survey reports) are not included and must be requested separately. Fees and request form can be found here.

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Cultural Resource Data Search Request

Beginning March 28, 2025, the State Historic Preservation Office (SHPO) will offer a record search service for a fee to parties undertaking federally funded, licensed, or permitted projects. The purpose of the service is to help users know early in the decision-making process how likely it is that preferred project sites will affect properties listed in or eligible for listing in the National Register of Historic Places and recorded in the cultural resource inventories.

This service is not intended for personal research or general inquiries.

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Historic Atlases

A collection of historic county atlases for Ohio counties from the late 19th and early 20th centuries.

Contact Us

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Location Information

800 E. 17th Ave., Columbus, OH 43211
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