Butterflies of Fairfield County
- Presents photos and species accounts of butterflies found within the county.
- http://www.butterfliesandmoths.org/map?dc=329&_dcc=1&si=36

Fairfield County Environmental Data
- Index to program areas, educational information, newsletters and events available through Ohio State University Extension.
- http://fairfield.osu.edu/

Fairfield Soil and Water Conservation District
- Agency responsible for the protection of natural resources within the county that assists landowners in planning and applying conservation practices on their land.
- http://www.fairfieldswcd.org/

Fairfield County Ground-Water Resources
- Factsheet providing information on ground-water resources in the county.
- http://ohioline.osu.edu/aex-fact/0490_23.html

Water Resources of Fairfield County
- Factsheet providing information on water resources and drinking-water quality in the county.
- http://ohioline.osu.edu/aex-fact/0480_23.html