National Historic Register properties in Allen county/parish, Ohio

• Marks-Family House (Delphos)
• Round Barn (Delphos)
• St. John Catholic Church (Delphos)
• Adgate Block (Lima)
• Allen County Courthouse (Lima)
• Armory-Latisona Building (Lima)
• Barr Hotel (Lima)
• Breese, Griffith, Farm (Lima)
• Cahill, Beck and R. C., Buildings (Lima)
• Dorsey Building (Lima)
• Elks Lodge (Lima)
• First National Bank and Trust Building (Lima)
• Hotel Argonne (Lima)
• J.M. Sealts Company Warehouse Building, The (Lima)
• Klaus Block (Lima)
• Lima Cleaning and Pressing Company (Lima)
• Lima Memorial Hall (Lima)
• Lima Pennsylvania Railroad Passenger Depot (Lima)
• Lima Stadium (Lima)
• Linneman Building (Lima)
• MacDonell House (Lima)
• Martin Block and Kibby Block (Lima)
• Metropolitan Block (Lima)
• Neal Clothing (Lima)
• Neely-Sieber House (Lima)
• Ohio Theatre (Lima)
• Renz Block (Lima)
• Round Barn (Lima)
• Union Block (Lima)
• U.S. Post Office (Lima)
• West Market Street Boulevard Historic District (Lima)
• Wheeler Building (Lima)
• Miami And Erie Canal, Deep Cut (Spencerville)