| Allen County: Official site. |
| Allen County Connections: Includes county profile and services, educational and government websites, parks and recreation, health facilities, and places to visit. |
| Allen County Extension Office: Branch office of Ohio State University, it combines the needs of local citizens and communities, with new research and technical information. |
| Allen County Profile: Provides demographic, business, and agriculture profiles. |
| Allen County, Ohio - U.S. Census Bureau: Provides population, demographic, and housing information. |
| Allen Economic Development Group: Provides community and business information. |
| County Map: Map of Allen County. |
| Lima - Allen County Convention and Visitors Bureau: Provides information on area attractions, restaurants, convention and meeting sites, shopping, sports and recreation, transportation, group tour planning, night life and community services. |
| Lima-Allen County Regional Planning Commission: An association of delegates that serve for discussion, sharing of ideas, and information among communities for local and regional issues. |
| Profile for Allen County: Information on the political infrastructure of the county. |
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