GIS Map Library

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
  • City Limits
  • Urban Growth Area
  • Tax Parcels
  • Zoning
  • Precincts
  • Voting/Taxing Districts
  • Public Facilities
  • Fire Districts
    Critical Areas:
  • Wetlands
  • FEMA Panel
  • FEMA BFE (NAVD88)
  • FEMA 100-Year
  • FEMA 500-Year
  • 2007 Flood Inundation
  • Floodways
  • Steep Slopes
  • Landslide DNR 24k
  • Landslide DNR 100k
  • Landslide DNR Compilation
  • Soil Erosion Hazard Areas
  • Liquefaction Susceptibility
  • Stream Buffers
  • Shoreline Environment
  • Hydric Soils
  • Aquifer Recharge Areas - CARA Category
  • Aquifer Recharge Areas - State Plane
  • CMZ - Channel Migration Zones
  • Arsenic Testing Required
  • Airport Obstruction Zones
  • No Septic Zones
  • Volcanic Hazards
    GIS software is needed to use the data. The tax parcel files are updated weekly, either on Friday or the following Monday, to capture any changes made throughout the week. All other files will be updated on an as-needed basis.

    • Maps by Topic

    Hardcopies of maps may be purchased at the Lewis County GIS Office. A price list for map products may be viewed at: GIS Map Product Rates