| U.S., City Directories, 1822-1995 | 1,385,585,010 |
| U.S., School Yearbooks, 1900-2016 | 881,226,624 |
| U.S., Public Records Index, 1950-1993, Volume 1 | 418,676,061 |
| U.S., Public Records Index, 1950-1993, Volume 2 | 402,455,532 |
| U.S., Index to Public Records, 1994-2019 | 330,831,862 |
| U.S., Phone and Address Directories, 1993-2002 | 313,273,297 |
| U.S., School Catalogs, 1765-1935 | 5,378,762 |
| U.S., Register of Civil, Military, and Naval Service, 1863-1959 | 3,783,772 |
| U.K. and U.S. Directories, 1680-1830 | 2,518,462 |
| U.S., College Student Lists, 1763-1924 | 1,516,361 |
| U.S., Railroad Retirement Pension Index, 1934-1987 | 1,514,828 |
| U.S., Appointments of U. S. Postmasters, 1832-1971 | 1,514,110 |
| U.S., Hinshaw Index to Selected Quaker Records, 1680-1940 | 887,019 |
| U.S., High School Student Lists, 1821-1923 | 645,940 |
| U.S., Selected Quaker College Yearbooks and Alumni Directories, 1896-2003 | 521,947 |
| U.S., Mining Accidents, 1839-2006 | 520,498 |
| Springfield, Missouri, U.S., St. Louis-San Francisco Railway Employee Cards, 1940-1980 | 396,807 |
| U.S., World War II Cadet Nursing Corps Card Files, 1942-1948 | 390,020 |
| U.S., Encyclopedia of American Quaker Genealogy, Vol I–VI, 1607-1943 | 356,712 |
| U.S., National Register of Scientific and Technical Personnel, 1921-1970 | 320,834 |
| U.S., Baseball Questionnaires, 1945-2005 | 154,715 |
| St. Louis, Missouri Directories, 1890 | 154,714 |
| Directory of Deceased American Physicians, 1804-1929 | 148,655 |
| U.S., Mormon Migration Records, 1840-1932 | 143,658 |
| Kansas City, Missouri, U.S., City Directories, 1890-1891 | 136,507 |
| U.S. and Canada, Quaker Yearly Meeting Annual Reports, 1808-1930 | 116,253 |
| Membership of The Church of Jesus Christ of Latter-day Saints, 1830-1848 | 104,231 |
| Kansas, U.S., Atchison, Topeka and Santa Fe Railway Prior Service Records, 1859-1935 | 95,958 |
| U.S., Sons of Norway Membership Records 1737-1970 | 90,584 |
| U.S., Index to Quaker Obituary Notices, 1822-2012 | 79,196 |
| U.S., Carded Service Records of Hospital Attendants, Matrons and Nurses, 1861-1865 | 73,588 |
| St. Joseph, Missouri, U.S., Directories, 1887-1890 | 70,325 |
| U.S., Quaker Genealogies, 1893-2003 | 31,254 |
| LDS Member Name Index, 1830-45 | 27,710 |
| Early Members of the Reorganized Church of Jesus Christ of Latter Day Saints | 25,973 |
| Missouri State Offices Political and Military Records, 1919 - 1920 | 25,922 |
| Web: Greene County, Missouri, U.S., School Records Index, 1911-1917 | 23,238 |
| U.S., Compiled Records from Various Societies, 1875-2010 | 22,086 |
| U.S., Published Quaker Family Histories, 1845-1920 | 17,950 |
| Buchanan County, Missouri, U.S., Directories, 1902-1906 | 17,396 |
| U.S., Professional Baseball Player Profiles, 1876-2004 | 13,622 |
| Biographical Directory of the United States Congress, 1774-2005 | 12,184 |
| U.S., Sons of the American Revolution, 1783-1902 | 10,909 |
| Blacksmiths and Related Trades Index, 1720-1940 | 9,955 |
| U.S., American Protective League Members Record Cards and Registers of Members, 1917-1919 | 8,804 |
| Presbyterian Ministerial Directory 1898 | 8,484 |
| U.S., Baptist Missionary Records and Sailing Cards, 1814-1970 | 8,068 |
| Motion Picture Studio Directories, 1919 and 1921 | 6,707 |
| Protestant Episcopal Church Clerical Directory, 1898 | 5,054 |
| Missouri, U.S., Quaker Records Index, 1867-1933 | 2,604 |
| U.S. and Canada, Quaker Monthly Meeting Historical Data, 1671-2010 | 2,087 |
| U.S., Identification Card Files of Prohibition Agents, 1920-1925 | 1,772 |
| Gould's St. Louis red book, 1914 | 1,590 |
| U.S., American Red Cross Nurse Files, 1916-1959 | 1,491 |
| Southwestern business directory, 1889 | 1,383 |
| Williams' Cincinnati directory | 1,334 |
| Missouri State Gazetteer and Business Directory, 1881 | 1,261 |
| Handy Book of American Authors, 1907 | 930 |
| Gould's blue book for the city of St. Louis, 1907 | 825 |
| Gould's blue book for the city of St. Louis, 1913 | 807 |
| Harvard alumni directory, 1919 | 803 |
| Historical and biographical sketches of the early churches and pioneer preachers of the Christian Church in Missouri | 597 |
| Gould's blue book for the city of St. Louis, 1903 | 591 |
| History of Missouri Baptists | 551 |
| Memorials of the introduction of Methodism into the eastern states | 487 |
| An apology for African Methodism | 475 |
| A Brief History of the Lutheran Church in America | 467 |
| The New-York annual register for the year of our Lord 1834 | 446 |
| A history of the Missouri Baptist General Association | 427 |
| A history of the Baptists in the western states east of the Mississippi | 421 |
| Highways and hedges, or, Fifty years of western Methodism | 396 |
| Friends of a half century : fifty memorials with portraits of members of the Society of Friends, 1840-1890 | 389 |
| A history of the German Congregational churches in the United States | 328 |
| Notable St. Louisans in 1900 | 289 |
| Missouri's hall of fame : lives of eminent Missourians | 274 |
| A History of the Wedgwood Family | 272 |
| From Kirtland to Salt Lake City | 260 |
| Men who make Saint Louis the city of opportunity | 260 |
| Founding and organization of the Daughters of the American Revolution and Daughters of the Revolution | 206 |
| Cyclopaedia of African Methodism | 198 |
| Family notes and reminiscences | 191 |
| Men who are making Kansas City : a biographical directory | 178 |
| Peirce's Colonial Lists | 159 |
| Quaker Arrivals at Philadelphia 1682-1750 | 137 |
| Souvenir and directory of the St. Paul Presbyterian Church of Philadelphia | 136 |
| Register of the St. Albans Presbyterian Church : organized August 22, 1868 : Seventh Avenue and E Street, St. Albans, W. Va. | 129 |
| Yearbook of The United Brethren in Christ, 1917 | 116 |
| A centennial discourse delivered to the First Congregational Church and Society in Leominster, September 24, 1843 | 114 |
| Yearbook of the Missouri Historical Society, 1927 | 100 |
| Remembering the days of old, or, The Puritans and their descendants | 97 |
| History of the Park Ridge schools, 1808 to 1938 | 96 |
| Historical sketch of the Congregational church and parish of Canton Center, Conn. | 94 |
| First annual gathering of the Clan MacLean Association of North America : held in the city of Chicago, June 12-16, 1893 | 83 |
| Celebration of the two hundred and fiftieth anniversary of the landing of Samuel Packard in this country, August 10, 1638 | 73 |
| Journal of Samuel Rose Parkinson No. 1 | 69 |
| Roster, 1969-1970 | 52 |
| Historical and Genealogical Account of the Family of Vance (Vans, Vaux, and De Vaux) | 46 |
| The buildings and churches of the mission of Santa Barbara | 40 |
| The Wiseman family and the old church at New Salem | 36 |
| Report of the executive board of the Friends' Association of Philadelphia and Its Vicinity, for the Relief of Colored Freedmen | 32 |