| UK, City and County Directories, 1766 - 1946 | 42,782,467 |
| London, England, City Directories, 1736-1943 | 19,793,623 |
| London, England, Workhouse Admission and Discharge Records, 1764-1921 | 10,098,399 |
| London, England, School Admissions and Discharges, 1840-1911 | 3,161,852 |
| London, England, Church of England Deaths and Burials, 1813-2003 | 2,780,380 |
| UK, Railway Employment Records, 1833-1956 | 2,041,650 |
| England, United Grand Lodge of England Freemason Membership Registers, 1751-1921 | 1,713,246 |
| UK, Postal Service Appointment Books, 1737-1969 | 1,466,970 |
| UK, Register of Duties Paid for Apprentices' Indentures, 1710-1811 | 1,045,652 |
| London, England, Poor Law School District Registers, 1852-1918 | 510,893 |
| London, England, Freedom of the City Admission Papers, 1681-1930 | 463,958 |
| U.K., City and County Directories, 1600s-1900s | 404,728 |
| London, England, Poor Law and Board of Guardian Records, 1738-1926 | 319,763 |
| London, England, Stock Exchange Membership Applications, 1802-1924 | 256,986 |
| England, Dreadnought Seamen's Hospital Admissions and Discharges, 1826-1930 | 221,010 |
| England, Pallot's Baptism Index, 1780-1837 | 201,977 |
| UK, Civil Engineer Lists, 1818-1930 | 194,446 |
| London, England, School Admissions and Discharges, 1912-1918 | 178,308 |
| UK, Electrical Engineer Lists, 1871-1930 | 164,887 |
| Kensington and Chelsea, Church of England Parish Chest Records, 1597-1950 | 135,370 |
| London, England, Metropolitan Police Pension Registers, 1852-1932 | 68,589 |
| Kensington and Chelsea, London, England, Poor Law Records, 1695-1921 | 66,501 |
| London, England, Church of England Confirmation Records, 1838-1923 | 52,837 |
| London, England, London Transport Staff Registers, 1863-1931 | 36,693 |
| England & Wales, Calendar of the Principal Ecclesiastical Dignitaries, 314-1853 | 27,466 |
| London, England, Royal Holloway and Bedford College Student Registers, 1849-1931 | 27,370 |
| London, England, TS Exmouth Training Ship Records, 1876-1918 | 12,107 |
| UK, Electrical Engineer Membership Forms, 1871-1901 | 7,849 |
| Who's Who in the World, 1910-1911 | 3,947 |
| Web: UK, Register of Railway Employee Injuries and Deaths, 1911-1915 | 3,915 |
| London, England, Selected Church of England Parish Registers, 1558-1875 | 2,967 |
| Thacker's Indian Directory, 1895 | 1,853 |
| London and Country Directory, 1811 | 1,655 |
| England, Southern Railway Magazine: Jan 1840 - Feb 1942 | 1,513 |
| England, Great Western Railway Magazine, 1938-1943 | 1,473 |
| Old Westminsters, Up to 1927 | 1,169 |
| Ancient Funeral Monuments - 1631 | 883 |
| Harrow School Register 1801-1893 | 807 |
| Baronia anglica concentrata, or, A concentrated account of all the baronies commonly called baronies in fee | 794 |
| London Post Office Directory, 1829 | 730 |
| Sufferings of the Clergy 1714 | 716 |
| The East India Register & Directory, 1844 | 673 |
| Westminster Church of England Marriage, Baptismal, and Burial Registers | 642 |
| England and Wales, Law List, 1843 | 588 |
| Report on Ecclesiastical Revenues of England & Wales 1835 | 558 |
| The London Diocese Book 1890 | 522 |
| England and Wales, Parish Register Abstract, 1831 | 520 |
| Studies in Church Dedications of England's Patron Saints | 467 |
| Scholars of St. Peter's College Westminster 1561-1812 | 462 |
| England Directory, 1811 | 412 |
| England Commercial Directory, 1816-1817 | 388 |
| The Clergyman's Intelligencer - Alphabetical List of Patrons in England & Wales 1745 | 336 |
| Walsall, Staffordshire, England, Church of England Parish Registers, 1570-1649 | 333 |
| Madron and Gulval, Cornwall, England, Church of England Parish Registers, 1592-1812 | 333 |
| University College School, London, Register 1831-1891 | 331 |
| The Publications of the Harleian Society, the Parish Registers of St Mary Aldermary, London | 296 |
| The Dutch Church Registers, Austin Friars London 1571-1874. | 276 |
| A History of the Wedgwood Family | 272 |
| Cripplegate Ward, London Aldermen, 1276-1900 | 270 |
| Ancestors of Welding Ring and His Wife Ida Malvina Mailler | 206 |
| Gipsy Smith His Life and Work | 182 |
| Headon, Nottingham, England, Church of England Parish Registers, 1566-1812 | 178 |
| Register of the Chapel of the Holy Trinity, Knightsbridge, 1658-1681 | 141 |
| The Religious Census of London | 135 |
| Hove and Preston, Sussex, England, Church of England Parish Registers, 1538-1812 | 133 |
| A brief history of the Quakers in England and Virginia and the Hargrave family | 94 |
| Journal of Samuel Rose Parkinson No. 1 | 69 |
| English Public Schools | 64 |
| Historical and Genealogical Account of the Family of Vance (Vans, Vaux, and De Vaux) | 46 |
| Souvenir of the Broadhurst Wilkinsons: Descendants of Joseph Edmondson | 29 |
| The Pedigrees of Lloyd of Dolobran, Montgomeryshire; The Wordsworth Family; Foster, late of Le Court, Hants; Hanbury of Holfield Grange, Essex; Wakefield of Sedgwick House, Kendal; and Wakefield of New Zealand and So. Australia | 27 |
| Clan Macleod Society, Annual Report, 1910-1911 | 19 |
| The Lott File | 13 |
| Grant of Arms and Pedigree of the Family of Grose | 9 |
| Finley of Maberacolton and McArthur of Miltown, County Tyrone | 8 |