A Portrait and Biographical Record of Allen and Van Wert Counties, Ohio Ancestry 
A Portrait and biographical record of Allen and Putnam Counties, Ohio : containing biographical sketches of many prominent and representative citizens, together with biographies and portraits of all the presidents of the United States, and biographies of the Governors of Ohio FamilySearch Library
A Portrait and biographical record of Allen and Putnam counties, Ohio, containing biographical sketches of many prominent and representative citizens, together with biographies and portraits of all the presidents of the United States, and biographies of the governors of Ohio, pt 1 LDS Genealogy
A Portrait and biographical record of Allen and Putnam counties, Ohio, containing biographical sketches of many prominent and representative citizens, together with biographies and portraits of all the presidents of the United States, and biographies of the governors of Ohio, pt 1 Internet Archive
A Portrait and biographical record of Allen and Putnam counties, Ohio, containing biographical sketches of many prominent and representative citizens, together with biographies and portraits of all the presidents of the United States, and biographies of the governors of Ohio, pt 2 LDS Genealogy
A Portrait and biographical record of Allen and Putnam counties, Ohio, containing biographical sketches of many prominent and representative citizens, together with biographies and portraits of all the presidents of the United States, and biographies of the governors of Ohio, pt 2 Internet Archive
A Portrait and biographical record of Allen and Van Wert Counties, Ohio : containing biographical sketches of many prominent and representative citizens, together with biographies and portraits of all the presidents of the United States, and bi Genealogy Gophers
A Portrait and biographical record of Allen and Van Wert Counties, Ohio : containing biographical sketches of many prominent and representative citizens, together with biographies and portraits of all the presidents of the United States, and biographies of the governors of Ohio FamilySearch Library
A Standard history of Allen County, Ohio : an authentic narrative of the past, with particular attention to the modern era in the commercial, industrial, eductional, civic and social development FamilySearch Library
A Standard history of Allen County, Ohio : an authentic narrative of the past, with particular attention to the modern era in the commercial, industrial, eductional, civic and social development, Vol. 2 Genealogy Gophers
A portrait and biographical record of Allen and Van Wert counties, Ohio, v. 1 LDS Genealogy
A portrait and biographical record of Allen and Van Wert counties, Ohio, v. 1 Internet Archive
A portrait and biographical record of Allen and Van Wert counties, Ohio, v. 2 LDS Genealogy
A portrait and biographical record of Allen and Van Wert counties, Ohio, v. 2 Internet Archive
A standard history of Allen county, Ohio : an authentic narrative of the past, with particular attention to the modern era in the commercial, industrial, educational, civic and social development LDS Genealogy
A standard history of Allen county, Ohio : an authentic narrative of the past, with particular attention to the modern era in the commercial, industrial, educational, civic and social development Internet Archive
Allen County History Index 1885 Heritage Pursuit
Allen County History Index 1921 Heritage Pursuit
Allen County ancestry FamilySearch Library
Allen County, Ohio, Bible, [family] and cemetery records FamilySearch Library
Compilation of Published Sources MyHeritage
Historical events of the Mennonite settlement in Allen and Putnam counties, Ohio FamilySearch Library
History of Allen County, Ohio Ancestry
History of Allen County, Ohio Google Books
History of Allen County, Ohio (Item No. 129), 1885 (included in U.S. County and Regional Histories and Atlases collection) Ancestry
History of Allen County, Ohio (Item No. 237), 1906 (included in U.S. County and Regional Histories and Atlases collection) Ancestry
History of Allen County, Ohio : containing a history of the county, its townships, towns, villages, schools, churches, industries, etc., portraits of early settlers and prominent men, biographies Genealogy Gophers
History of Allen County, Ohio : containing a history of the county, its townships, towns, villages, schools, churches, industries, etc., portraits of early settlers and prominent men, biographies, history of the Northwest Territory, history of Ohio, statistical and miscellaneous matter, etc., etc FamilySearch Library
History of Allen County, Ohio : containing a history of the county, its townships, towns, villages, schools, churches, industries, etc.; portraits of early settlers and prominent men; biographies; history of the Northwest Territory Genealogy Gophers
History of Allen County, Ohio : containing a history of the county, its townships, towns, villages, schools, churches, industries, etc.; portraits of early settlers and prominent men; biographies; history of the Northwest Territory; history of Ohio; statistical and miscellaneous matter, etc., etc. FamilySearch Library
History of Allen County, Ohio and Representative Citizens LDS Genealogy
History of Allen County, Ohio and Representative Citizens Internet Archive
History of Allen County, Ohio and representative citizens FamilySearch Library
History of Allen County, Ohio and representative citizens Genealogy Gophers
History of Allen County, Ohio and representative citizens Genealogy Gophers
History of Allen County, Ohio, 1820-1889 : excerpted from the centennial history of Ohio; 1898 edition of Howe's historical collections of Ohio, and illustrated with Howe's sketches from 1846 to 1890 FamilySearch Library
History of Allen County, Ohio, and representative citizens, Part One LDS Genealogy
History of Allen County, Ohio, and representative citizens, Part One Internet Archive
History of Allen County, Ohio, and representative citizens, Part Two LDS Genealogy
History of Allen County, Ohio, and representative citizens, Part Two Internet Archive
History of Allen County, Ohio. Containing a history of the county, its townships, towns, villages, schools, churches, industries, etc; portraits of early settlers and prominent men; biographies; history of the Northwest Territory; history of Ohio; statistical and miscellaneous matter, etc., etc LDS Genealogy
History of Allen County, Ohio. Containing a history of the county, its townships, towns, villages, schools, churches, industries, etc; portraits of early settlers and prominent men; biographies; history of the Northwest Territory; history of Ohio; statistical and miscellaneous matter, etc., etc Internet Archive
Morgan Index of Ohio People, Businesses and Institutions, 1796-1850 (index of names that appear in many books, pamphlets and broadsides) OhioLINK
Periodical Source Index (index to 3.1 million articles in historical and genealogical publications) Allen County Public Library
Portrait and Biographical Album of Allen and Van Wert Counties, Ohio, 1896 (included in U.S. County and Regional Histories and Atlases collection) Ancestry
The 1976 history of Allen County, Ohio FamilySearch Library
The First Families of Allen County, Ohio index : a collection of the first seven hundred and ninety five members and their direct lineage to the pioneers that resided in Allen County, Ohio prior to 1840 WorldCat
The first families of Allen County, Ohio, index : a collection of the first seven hundred and ninety five members and their direct lineage to the pioneers that resided in Allen County, Ohio prior to 1840 FamilySearch Library