Welcome to the Lewis County Map Library. Lewis County GIS has constructed and maintains hundreds of map layers of land features such as roads, rivers and drainage basins, hydric soil, hydrology, topographic relief, urban growth areas, and city and district boundaries.

Select Web Map below or a topic on the right to begin →

Launch Web Map

Web Map Starter Guide

The Lewis County Web Map combines all the data from the previous versions and more. Learn More →

Terms of Use & Data Disclaimer

GIS Data:

Download our commonly requested GIS data layers in ESRI shapefile format:
  • Road Centerlines
  • Tax Parcels
  • Zoning
  • Precincts
  • Voting/taxing Districts
    GIS software is needed to use the data. The files are updated weekly, either on Friday or the following Monday, to capture any changes made throughout the week.