Otter Tail Country Tourism Association
- Tourist guide for the Ottertail-Fergus Falls-Battle Lake area in west central Minnesota.
- http://www.ottertailcountry.com/

Otter Tail County Historical Society
- Organized in 1927. Museum, gallery, research library. Members receive bimonthly newsletter.
- http://www.otchs.org/

National Association of Counties: Otter Tail County
- Elected county officials, links to demographic information and list of place names in the county.
- http://www.naco.org/Template.cfm?Section=Find_a_County&Template=/cffiles/counties/county.cfm&id=27111

Pelican Lakes Property Owners Association
- Contains calendar of events, newspaper, Yacht Club news, elected board members, and items of interest to residents of Pelican Lake, Little Pelican, Fish Lake and Bass Lake.
- http://www.pelicanlakemn.org/

History Museum of East Otter Tail County
- Housed in a building that was a church, then the public library. Open every day. Free admission. Has a genealogical lab.
- http://www.historymuseumeot.org/

National Weather Service: Otter Tail County, MN
- Zone forecast, statewide forecast. Current conditions around the area (separate reports for eastern and western parts of the county). Statewide weather summary for past 24 hours, including precipitation, temperatures.
- http://weather.noaa.gov/cgi-bin/iwszone?Sites=:mnz030%0D%0A:mnz031

Otter Tail County Map
- Shows major highways, county line, some cities. Interactive.
- http://tiger.census.gov/cgi-bin/mapsurfer?infact=2&outfact=2&act=move&on=CITIES&on=majroads&on=places&on=interstate&on=statehwy&on=ushwy&tlevel=-&tvar=-&tmeth=i&mlat=46.40790&mlon=-95.71353&msym=redp

Luhman Real Estate
- A full service real estate agency for residential, commercial, farm and lake properties. Offices in Fergus Falls and Ottertail. Online listings with photos and contact information for agents.
- http://www.luhmanrealestate.com/

Otter Tail County MnGenWeb
- Genealogy and local history.
- http://www.jsenterprises.com/ottertail/