Allen County Ground-Water Resources - Factsheet providing information on ground-water resources in the county. ohioline.osu.edu/aex-fact/0490_02.html
Allen Soil and Water Conservation District - Promotes the wise use, improvement and maintenance of the soil, water and other natural resources in the County. www.allencounty.oh.nacdnet.org
Butterflies of Allen County - Presents photos and species accounts of butterflies found within the county. www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/chklist/states/counties/oh_3.htm
Water Resources of Allen County - Factsheet providing information on water resources and drinking-water quality in the county. ohioline.osu.edu/aex-fact/0480_02.html
