  |
Madison County Environmental Data - http://madison.osu.edu/
Index to program areas, educational information, newsletters and events available through Ohio State University Extension. |
| |
Madison Soil and Water Conservation District - http://www.co.madison.oh.us/15085/
Agency responsible for the protection of natural resources within the county that assists landowners in planning and applying conservation practices on their land. |
 |
Butterflies of Madison County - http://www.butterfliesandmoths.org/map?dc=289&_dcc=1&si=36
Presents photos and species accounts of butterflies found within the county. |