Counties
- Auglaize County GIS
- Butler County GIS
- Clark County GIS
- Clermont County GIS
- Clinton County GIS
- Darke County Auditor
- Greene County GIS/Auditor
- Miami County Auditor
- Montgomery County Auditor
- Montgomery County Engineer (Web Services)
- Preble County Auditor
- Shelby County Auditor
- Warren County GIS
Regional
State
- Ohio Department of Transportation GIS
- Ohio Department of Transportation VRS RTK Network
- Ohio Environmental Protection Agency GIS
- Ohio Department of Natural Resources (ODNR) GIS
- Ohio Location Based Response System (LBRS)
- Ohio Statewide Imagery Program (OSIP)
- Ohio Geographically Referenced Information Program (OGRIP)
- OGRIP Data Portal
- Ohio GIS Conference
- Ohio Chapter of URISA
- Ohio Chapter of URISA Match Program (Mentorship)
- OhioView
Federal
- FEMA Floodplain (Web Services)
- National Wetlands Inventory at US Fish & Wildlife Service
- US Census Bureau GIS Data
Education
- Miami University Geography/GIS
- Sinclair Community College GIS
- Clark State GIS
- Wittenberg University Geography/GIS
- Wright State University Department of Urban Affairs and Geography (including GIS)
- University of Dayton GIS
- Miami Valley Career Technical Center (Includes GIS)
ESRI
- Esri (Main Site)
- ArcGIS Online
- ArcGIS Ideas (Vote for future changes)
- Esri Forums
- Esri Support
- GitHub (Code)
- ArcGIS API for JavaScript
- ArcGIS API for Flex
Private Industry
- Accela (Asset Management)
- CESO
- CityWorks (Asset Management)
- Cyclomedia
- LJB
- Pictometry
- Precision Laser & Instrument (GPS)
- Transmap
- Woolpert