| SURNAME | GIVEN NAME | CD | NEWSPAPER | DATE | PAGE | SUBJECT | NOTES | MD |
| UBA | D. | 11 | American Citizen | 17 Jan 1872 | 2 | Court Notice | ||
| UBA | I. | 11 | American Citizen | 17 Jan 1872 | 2 | Court Notice | ||
| UBER | Earnest | 16 | The Democratic Herald | 01 Jul 1898 | 5 | Graduate | ||
| UBER | H. H. | 11 | Zieglers Democratic Herald | 12 Feb 1874 | 4 | Court | ||
| UBER | J. B. | 11 | The Democratic Herald | 29 Mar 1871 | 3 | Church | ||
| UBER | Jesse | 8 | The Butler Union | 04 Jun 1861 | 3 | License Application | Slippery Rock Twp | |
| UBER | Peter | 6 | Democratic Herald | 16 Feb 1853 | 2 | Petition for Public House | Centreville Borough | |
| UBER | Peter | 7 | The Democratic Herald | 13 Feb 1856 | 3 | Receipts & Expenditures | Centerville | |
| UBER | Peter | 8 | The Butler Union | 15 Apr 1863 | 4 | Elected | Centerville | |
| UBER | Peter C. | 10 | American Citizen | 13 Apr 1870 | 2 | Married | ||
| UCHAS | John | 8 | The Union Herald | 27 Aug 1862 | 3 | Sheriff's Sales | Butler Twp | |
| UFFLEMAN | John | 9 | Democratic Herald | 30 Sep 1868 | 2 | Appraisement List | Brady | |
| UHL | C. | 9 | American Citizen | 22 Sep 1869 | 2 | Restaurant License | Middlesex | |
| UHL | C. | 16 | Zelienople News | 30 Nov 1892 | 3 | Public Property Sold | Middle Lancaster | |
| UHL | Chris. | 14 | The Democratic Herald | 22 Feb 1882 | 3 | List of Jurors | Lancaster Twp | |
| UHL | Chrisopher | 11 | The Democratic Herald | 29 Mar 1871 | 2 | Official | ||
| UHL | Christ. | 11 | The Democratic Herald | 19 Apr 1871 | 2 | Official | ||
| UHL | Christopher | 8 | The Butler Union | 15 Apr 1863 | 4 | Elected | Lancaster Twp | |
| UHL | Christopher | 14 | The Butler Citizen | 10 Aug 1881 | 2 | Register's Notice | Lancaster Twp | |
| UHLE | Christ | 15 | Connoquenessing Valley News | 14 Aug 1884 | 2 | Jury List | Lancaster Twp. | |
| UHRAY | G. J. | 15 | Connoquenessing Valley News | 19 Feb 1891 | 3 | Court Notes | ||
| UHREY | Gust. | 16 | The Democratic Herald | 04 Mar 1898 | 1 | Petition | ||
| ULLERWH | John Frederick | 5 | Butler Intelligencer | 13 Nov 1841 | 3 | Registers Notice | Connoquenessing | |
| ULMAN | H.C. | 7 | The Democratic Herald | 01 Oct 1856 | 3 | Unclaimed Mail | ||
| ULRICHT | Anna C. | 15 | Connoquenessing Valley News | 09 Apr 1891 | 2 | Marriage License | Saxonburg | |
| ULRICK | J. | 16 | Zelienople News | 30 Nov 1892 | 3 | Public Property Sold | Thornhill | |
| UMPSTEAD | James | 8 | The Butler Union | 15 Apr 1863 | 4 | Elected | Harmony | |
| UMSTEAD | Elizabeth Kerner | 8 | The Union Herald | 10 May 1865 | 3 | Notice in Partition | Middlesex Twp | X |
| UMSTEAD | Henry | 4 | Butler Intelligencer | 11 Apr 1840 | 2 | Justices of Peace | Connoquenessing | |
| UMSTEAD | J. | 8 | The Union Herald | 01 Mar 1865 | 3 | Receipts & Expenditures | Harmony | X |
| UMSTEAD | Jonas | 8 | The Butler Union | 29 Oct 1861 | 3 | Traverse Juror | Harmony | X |
| UMSTEAD | Jonas | 9 | Democratic Herald | 14 Aug 1867 | 4 | Estate | Harmony | |
| UMSTEAD | Jonas | 9 | Union Herald | 24 Jul 1867 | 3 | Death | Harmony | |
| UMSTEAD | Joshua | 2 | Butler Sentinel | 15 Nov 1828 | 2 | Marriage | Harmony | |
| UMSTEAD | Miss Hannah | 14 | Connoquenessing Valley News | 08 May 1879 | 2 | Advertisement | Harmony | X |
| UMSTEAD | Rev. J. W. | 15 | Connoquenessing Valley News | 16 Apr 1891 | 3 | Death Notice | Evans City | |
| UMSTEAD | Richard | 8 | The Union Herald | 10 May 1865 | 3 | Notice in Partition | Middlesex Twp | X |
| UMSTED | Miss Hannah | 7 | The Democratic Herald | 10 Sep 1857 | 3 | County Fair Committee | Harmony | |
| UNCAPHAR | Sarah C. | 15 | Connoquenessing Valley News | 03 Oct 1889 | 3 | Marriage | Butler | |
| UNCAPHER | Deliah | 13 | Parker City Daily | 29 Feb 1876 | 3 | Court Proceedings | ||
| UNCAPHER | John | 13 | Parker City Daily | 29 Feb 1876 | 3 | Court Proceedings | ||
| UNDERHILL | 11 | The Democratic Herald | 10 May 1871 | 3 | Notice | |||
| UNDGER | Mary | 15 | Connoquenessing Valley News | 04 Jun 1891 | 2 | Marriage License | Franklin Twp. | |
| UNGHER | David | 8 | The Butler Union | 22 Jul 1863 | 3 | Drafted | Parker Twp | |
| UNION CHURCH | 6 | Democratic Herald | 22 Mar 1854 | 3 | Trustee List | Cranberry Township | ||
| UNKS | Joseph | 8 | The Union Herald | 10 May 1865 | 3 | Sudden Death | Jefferson Twp | |
| UNREADABLE | Hiram | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Mercer | |
| UNREADABLE | Jacob | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Slipperyrock | |
| UNREADABLE | James | 4 | Butler Intelligencer | 19 Dec 1840 | 3 | Married | Carlisle, Father | |
| UNREADABLE | Mary | 4 | Butler Intelligencer | 19 Dec 1840 | 3 | Married | Bride | |
| UNREADABLE | Matthew | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Donegal | |
| UNREADABLE | Moses | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Donegal | |
| UNREADABLE | Patrick | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Venango | |
| UNREADABLE | Peter | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Venango | |
| UNREADABLE | Robert | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Connoquenessing | |
| UNREADABLE | Samuel | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Centre | |
| UNREADABLE | William | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Centre | |
| UNREADABLE | William | 4 | Butler Repository | 04 Jul 1840 | 2 | Dem. Convention | Delegate, Parker | |
| UNSEATED LANDS | Sale | 10 | American Citizen | 25 May 1870 | 4 | List | ||
| UPDEGRAFF | D. | 11 | Butler County Citizen | 02 Sep 1874 | 3 | News | ||
| UPDEGRAFF | D. | 13 | The Butler County Citizen | 20 Oct 1875 | 3 | Advertisement | Fairview Twp | |
| UPDEGRAFT | Rev. J. L. | 16 | The Democratic Herald | 29 Jul 1898 | 2 | Visiting | Elmbud | |
| UPDEGRAPH | John | 8 | The Butler Union | 22 Jul 1863 | 3 | Drafted | Worth Twp | |
| UPDEGRAPH | Miss Mary | 16 | The Democratic Herald | 20 May 1898 | 4 | Visiting | ||
| UPPERMAN | Conrad | 4 | Butler Intelligencer | 04 Sep 1840 | 3 | New Store | Buffalo Twp., Deceased | X |
| UPTEGRAFF | John | 11 | The Democratic Herald | 08 Feb 1871 | 3 | Tax Collector | Worth | |
| UPTEGRAFF | John | 11 | American Citizen | 31 Jan 1872 | 2 | Official | ||
| UPTEGRAFF | John | 11 | American Citizen | 07 Feb 1872 | 3 | Official | ||
| UPTEGRAFF | John | 11 | American Citizen | 14 Feb 1872 | 3 | Official | ||
| UPTEGRAFF | John | 11 | American Citizen | 21 Feb 1872 | 3 | Official | ||
| UPTEGRAPH | Miss Blanche | 15 | Connoquenessing Valley News | 25 Sep 1890 | 3 | Marriage | Portersville | |
| UPTHEGRAFT | Elizabeth | 7 | The Democratic Herald | 28 Sep 1859 | 4 | Notice | Worth Twp | |
| UPTHEGRAFT | William | 7 | The Democratic Herald | 28 Sep 1859 | 4 | Notice | Worth Twp | |
| UPTOLD | Geo., Rev. | 4 | Butler Intelligencer | 19 Dec 1840 | 3 | Married | Officiating | |
| URBAN | Michael J. | 15 | Connoquenessing Valley News | 04 Jun 1891 | 2 | Property Transfer | Venango Twp. | |
| URMY | Isaac | 1 | The Butler Centinel | 24 Jul 1821 | 3 | List of Letters | Harmony | X |
| URNY | Isaac | 1 | The Butler Centinel | 14 Oct 1820 | 2 | List of Letters | Harmony | X |
| URVIN | Clara | 16 | The Democratic Herald | 11 Mar 1898 | 10 | Indicted for Fornication | Venango Twp | |
| USSELTON | Thomas | 1 | The Butler Centinel | 29 May 1821 | 3 | Militia Elections | ||
| USSERY | Col. | 11 | The Democratic Herald | 15 Feb 1871 | 3 | Medical |