| Title | Category | Places | Record Count |
|---|---|---|---|
| American Genealogical-Biographical Index (AGBI) | Reference Materials & Finding Aids | USA | 3,685,947 |
| Canadian Genealogy Index, 1600s-1900s | Reference Materials & Finding Aids | Canada | 2,255,689 |
| Geographic Reference Library | Reference Materials & Finding Aids | USA | 1,093,086 |
| Jewish Given Name Variations | Reference Materials & Finding Aids | United Kingdom; Ireland | 721,272 |
| Spanish-American Family History Guide | Reference Materials & Finding Aids | USA | 313,616 |
| Genealogical Library Master Catalog | Reference Materials & Finding Aids | USA | 238,559 |
| Siebmacher’s Wappenbuch | Reference Materials & Finding Aids | Germany; Austria; Croatia; Czech Republic; Hungary; Croatia | 147,252 |
| JewishGen Belarus Databases Name Index | Reference Materials & Finding Aids | Belarus | 55,390 |
| Dawes Commission Index, 1898-1914 | Reference Materials & Finding Aids | USA | 52,631 |
| Dictionary of Jewish Surnames in Russian Empire | Reference Materials & Finding Aids | Belarus; Lithuania; Russia; Ukraine | 51,385 |
| Library of Congress 50,000 Bibliographic Sources | Reference Materials & Finding Aids | 51,128 | |
| Family Historian's Address Book | Reference Materials & Finding Aids | USA | 49,015 |
| Webster's Dictionary of the English Language, 1806 | Reference Materials & Finding Aids | USA | 38,029 |
| Minnesota Newspaper Headline Index | Reference Materials & Finding Aids | USA; Minnesota | 31,598 |
| England Topographical Dictionary | Reference Materials & Finding Aids | England; Channel Islands; Isle of Man | 30,687 |
| U.S. Cemetery Address Book | Reference Materials & Finding Aids | USA | 28,812 |
| Scottish Covenanters Index | Reference Materials & Finding Aids | Scotland | 26,044 |
| Ancestry's Red Book: American State, County, and Town Sources | Reference Materials & Finding Aids | USA | 22,485 |
| Meyers Konversations-Lexikon | Reference Materials & Finding Aids | Germany | 20,738 |
| World Fact Book, 1994 | Reference Materials & Finding Aids | 19,931 | |
| Miriam Weiner Eastern European Archival Database | Reference Materials & Finding Aids | United Kingdom; Ireland | 19,021 |
| Chalmers' Biographical Dictionary | Reference Materials & Finding Aids | United Kingdom; Ireland | 16,716 |
| Source: A Guidebook of American Genealogy | Reference Materials & Finding Aids | USA | 15,598 |
| Missouri Cemetery Inscription Sources | Reference Materials & Finding Aids | USA; Missouri | 15,040 |
| Dawes Commission Index, 1896 | Reference Materials & Finding Aids | USA | 13,980 |
| Cambridge, Massachusetts History, Supplement | Reference Materials & Finding Aids | USA; Massachusetts; Middlesex | 13,655 |
| The Library (LDS Family History Library) | Reference Materials & Finding Aids | 13,460 | |
| Leavenworth, Kansas History Name Index | Reference Materials & Finding Aids | USA; Kansas; Leavenworth | 11,430 |
| Hamilton County, Ohio History | Reference Materials & Finding Aids | USA; Ohio; Hamilton | 11,344 |
| Michigan Pioneer Society Collections Report, Vol. 12 | Reference Materials & Finding Aids | USA; Michigan | 11,256 |
| Midwest Pioneers: Collections of the State Historical Society of Wisconsin, Vol. 19 | Reference Materials & Finding Aids | USA | 10,575 |
| Library of Congress Research Guide | Reference Materials & Finding Aids | USA | 9,656 |
| Midwest Pioneers: Collections of the State Historical Society of Wisconsin, Vol. 18 | Reference Materials & Finding Aids | USA | 9,623 |
| Origin of Certain Place Names in the United States | Reference Materials & Finding Aids | USA | 8,860 |
| Midwest Pioneers: Collections of the State Historical Society of Wisconsin, Vol. 14 | Reference Materials & Finding Aids | USA | 7,878 |
| Collections of the State Historical Society of Wisconsin, Volume 11 | Reference Materials & Finding Aids | USA | 7,844 |
| U.S. Military Records | Reference Materials & Finding Aids | USA | 7,770 |
| Collections of the State Historical Society of Wisconsin, Volume 12 | Reference Materials & Finding Aids | USA | 7,602 |
| Midwest Pioneers: Collections of the State Historical Society of Wisconsin, Vol. 20 | Reference Materials & Finding Aids | USA | 7,116 |
| Midwest Pioneers: Collections of the State Historical Society of Wisconsin, Vol. 17 | Reference Materials & Finding Aids | USA | 6,762 |
| Holocaust: Krakow (Poland) Transport Lists, 1940 | Reference Materials & Finding Aids | Poland | 6,701 |
| Old United Empire Loyalists List | Reference Materials & Finding Aids | United Kingdom; Ireland | 6,353 |
| Etymological Dictionary of Family and Christian Names | Reference Materials & Finding Aids | 6,169 | |
| Encyclopedic History of the LDS Church | Reference Materials & Finding Aids | United Kingdom; Ireland | 5,754 |
| Midwest Pioneers: Collections of the State Historical Society of Wisconsin, Vol. 16 | Reference Materials & Finding Aids | USA | 5,484 |
| The Archives: A Guide to the NARA Field Branches | Reference Materials & Finding Aids | USA | 4,896 |
| Ancestry's Concise Genealogical Dictionary | Reference Materials & Finding Aids | 4,799 | |
| Jewish Community Locator | Reference Materials & Finding Aids | Germany; Switzerland; Algeria; Armenia; Austria; Azerbaijan; Belarus; Belgium; Bosnia; Bulgaria; Croatia; Czech Republic; Denmark; Egypt; Estonia; France; Greece; Hungary; Iran; Iraq; Israel; Italy; Kazakhstan; Latvia; Lebanon; Libyan Arab Jamahiriya; Lithuania; Macedonia; Moldova; Morocco; Netherlands; Poland; Romania; Russia; Slovakia; Slovenia; Spain; Syrian Arab Republic; Tajikistan; Tunisia; Turkey; Turkmenistan; Ukraine; Uzbekistan; Yugoslavia; Luxembourg; Croatia; Georgia (Republic of) | 4,766 |
| Chicago and Cook County, A Guide to Research | Reference Materials & Finding Aids | USA; Illinois; Cook | 4,539 |
| Midwest Pioneers: Collections of the State Historical Society of Wisconsin, Vol. 15 | Reference Materials & Finding Aids | USA | 4,526 |
| Michigan Facts and Figures | Reference Materials & Finding Aids | USA; Michigan | 4,487 |
| Cemetery Record Compendium | Reference Materials & Finding Aids | USA | 4,340 |
| Confederate Research Sources | Reference Materials & Finding Aids | USA | 3,835 |
| Belarus: Jewish Surnames in Minsk Vital Record Collections | Reference Materials & Finding Aids | Belarus | 3,435 |
| California Cemetery Inscription Sources | Reference Materials & Finding Aids | USA; California | 3,169 |
| U.S. County History Catalog | Reference Materials & Finding Aids | USA | 3,136 |
| Minnesota Region, 1823 | Reference Materials & Finding Aids | USA; Minnesota | 3,047 |
| Gemeindelexikon für das Königreich Preußen | Reference Materials & Finding Aids | Germany | 3,029 |
| Iosco County, Michigan Glass Negatives, 1892-1905: East Tawas | Reference Materials & Finding Aids | USA; Michigan; Iosco | 2,989 |
| Ancestry's Guide to Research | Reference Materials & Finding Aids | 2,837 | |
| National Archives Guide to Genealogical Research | Reference Materials & Finding Aids | USA | 2,801 |
| Munsell's American Genealogist | Reference Materials & Finding Aids | USA | 2,783 |
| Microfilm Resources for Research: A Comprehensive Catalog | Reference Materials & Finding Aids | USA | 2,775 |
| Geographisches Lexikon der Schweiz | Reference Materials & Finding Aids | Switzerland | 2,753 |
| Peerage of the United Kingdom and Ireland, Volumes I-IV | Reference Materials & Finding Aids | United Kingdom; Ireland | 2,630 |
| Trans-Mississippi West, 1804-1912, Vol. 1-2 | Reference Materials & Finding Aids | USA | 2,540 |
| England Topographical Dictionary | Reference Materials & Finding Aids | England | 2,520 |
| Minnesota, 1870 | Reference Materials & Finding Aids | USA; Minnesota | 2,407 |
| A Key to Southern Pedigrees | Reference Materials & Finding Aids | USA | 1,911 |
| Louisiana City Parish Index | Reference Materials & Finding Aids | USA; Louisiana | 1,717 |
| Kansas Towns and Cities, 1912 | Reference Materials & Finding Aids | USA; Kansas | 1,701 |
| Japan Country Study | Reference Materials & Finding Aids | Japan | 1,700 |
| U.S. Catholic Sources | Reference Materials & Finding Aids | USA | 1,662 |
| China Country Study | Reference Materials & Finding Aids | China; Taiwan | 1,644 |
| Kansas Post Offices, 1880 | Reference Materials & Finding Aids | USA; Kansas | 1,432 |
| Charles Warner, Southern California, 1890 | Reference Materials & Finding Aids | USA; California | 1,430 |
| Detroit and Northern Michigan Pleasure Resorts, 1883 | Reference Materials & Finding Aids | USA; Michigan; Oakland; Wayne | 1,397 |
| General Armory of England, Scotland, Ireland and Wales | Reference Materials & Finding Aids | United Kingdom; Ireland | 1,353 |
| Chile Country Study | Reference Materials & Finding Aids | Chile | 1,345 |
| Egypt Country Study | Reference Materials & Finding Aids | Egypt | 1,341 |
| Finland Country Study | Reference Materials & Finding Aids | Finland | 1,303 |
| Wisconsin Handbook, 1856 | Reference Materials & Finding Aids | USA; Wisconsin | 1,302 |
| Dictionary of Biography and Mythology, Volume I | Reference Materials & Finding Aids | England | 1,244 |
| Colombia Country Study | Reference Materials & Finding Aids | Colombia | 1,238 |
| Minnesota Guide, 1869 | Reference Materials & Finding Aids | USA; Minnesota | 1,213 |
| Indonesia Country Study | Reference Materials & Finding Aids | Indonesia | 1,188 |
| Minnesota Pamphlet for Settlers, 1878 | Reference Materials & Finding Aids | USA; Minnesota | 1,166 |
| Bolivia Country Study | Reference Materials & Finding Aids | Bolivia | 1,152 |
| Nigeria Country Study | Reference Materials & Finding Aids | Nigeria; Niger | 1,151 |
| Peru Country Study | Reference Materials & Finding Aids | Peru | 1,145 |
| Romania Country Study | Reference Materials & Finding Aids | Romania | 1,144 |
| Ghana Country Study | Reference Materials & Finding Aids | Ghana | 1,136 |
| North Korea Country Study | Reference Materials & Finding Aids | North Korea | 1,119 |
| Libya Country Study | Reference Materials & Finding Aids | Libyan Arab Jamahiriya | 1,111 |
| Philippines Country Study | Reference Materials & Finding Aids | Philippines | 1,109 |
| Missouri Biographical Dictionary | Reference Materials & Finding Aids | USA; Missouri | 1,103 |
| Saudi Arabia Country Study | Reference Materials & Finding Aids | Saudi Arabia | 1,103 |
| Portugal Country Study | Reference Materials & Finding Aids | Portugal | 1,100 |
| Poland Country Study | Reference Materials & Finding Aids | 1,097 | |
| Cambodia Country Study | Reference Materials & Finding Aids | Cambodia | 1,096 |