| Last Name | Given Name / Maiden Name | Birth | Death | Notes |
| O'Boyle | James | 1870 | 1929 | h/o Mary Ann Finnegan O'Boyle |
| O'Boyle | Lillian H | 17 Oct 1909 | 26 Oct 1994 | s/s M Geraldine O'Boyle |
| O'Boyle | M Geraldine | 1908 | 1988 | s/s Lillian H O'Boyle |
| O'Boyle | Mary Ann Finnegan | 28 Jun 1874 | 4 Aug 1947 | w/o James O'Boyle |
| O'Brien | Alice M Wilberding | 1931 | n/d | s/s Richard G "Bing" O'Brien |
| O'Brien | Catherine Lenz | 4 Jul 1870 | 16 Jun 1935 | w/o John M O'Brien |
| O'Brien | Christine Ann Schueller | 20 Feb 1895 | 26 Jun 1967 | w/o George Philip O'Bien |
| O'Brien | Donald W "Jake" | 30 Jul 1920 | 11 Apr 1994 | s/o George Philip & Christine Ann Schueller O'Brien |
| O'Brien | Eugene Joseph | 13 May 1926 | 3 May 1989 | TEC 5 US Army WWII |
| O'Brien | Frank L "Frank" | 29 Apr 1903 | 4 Apr 1961 | s/o John M & Catherine Lenz O'Brien |
| O'Brien | George Philip | 25 Jan 1895 | 14 Nov 1955 | h/o Christine Ann Schueller O'Brien, Iowa PbT CAS DET 1190 Demob GP WWI |
| O'Brien | Helen A | 2 Sep 1918 | Mar 1980 | d/o George Philip & Christine Ann Schueller O'Brien |
| O'Brien | John M | 1 Mar 1864 | 1 Apr 1935 | h/o Catherine Lenz O'Brien, married 14 May 1889, p/o Lucy, Edard, Vincent, Annabelle, Arthur, Josephine, George, Frank, Robert |
| O'Brien | John Terrill | 17 Jan 1890 | 9 Dec 1918 | h/o Anna Halbig O'Brien, p/o Paul & an infant |
| O'Brien | Madeline May | 5 Feb 1923 | 16 Nov 2000 | |
| O'Brien | Richard G "Bing" | 29 Dec 1930 | 4 Jul 2008 | h/o Alice M Wilberding O'Brien, married 1 Oct 1960; PFC US Army Korea |
| O'Brien | Robert Paul | 28 Dec 1912 | 18 Apr 1970 | Iowa S Sgt 9222 Tech SVC Unit WWII |
| O'Brien | Thomas | 29 Jun 1812 | 30 Jun 1890 | |
| Ocken | Chester J | 7 Jun 1984 | 7 Jun 1984 | h/o Lucinda A Reinart Ocken, married 5 Jul 1938, p/o Gerald, Elaine, Diane, Kathleen, Sandra |
| Ocken | Lucinda A Reinart | 29 Jul 1918 | 8 Jun 2020 | w/o Chester Ocken, married 5 July 1938, p/o Jerry, Diane, Elane, Sandy, Katie |
| Ocken | Rose Marilyn Gehling | 16 Nov 1931 | 27 Apr 2020 | s/s Wilfred J Ocken |
| Ocken | Wilfred J | 22 Mar 1924 | 5 Apr 2011 | h/o Rose Marilyn Gehling Ocken, married 19 Feb 1952, p/o Diane, Marilyn, Jolene |
| O'Connell | Elizabeth Ann | 28 Apr 1932 | 28 Apr 1932 | d/o Michael Richard "Mike" & Loretta C Bowler O'Connell |
| O'Connell | Loretta C Bowler | 13 Sep 1895 | 18 Jan 1975 | s/s Michael Richard "Mike" O'Connell |
| O'Connell | Michael Richard "Mike" | 1893 | 1979 | h/o Loretta C Bowler O'Connell |
| O'Connor | Grace Marie Corson | 23 Sep 1917 | 12 Jul 1953 | w/o Harry O'Connor, married 22 Aug 1945, p/o Patrick, Michael, Timothy |
| O'Connor | LaVonne Clara Anna Stangl | 29 Jul 1928 | 26 Oct 2021 | s/s Dr Orville M O'Connor |
| O'Connor | Orville M Dr | 11 Dec 1922 | 16 Nov 1971 | h/o LaVonne Clara Anna Stangl, p/o Vincent & Collen |
| Odendahl | Albert Edward | 18 Nov 1882 | 23 Nov 1977 | h/o Emma C Wieland Odendahl |
| Odendahl | Arnold R | 1 Jul 1916 | 19 Nov 2000 | h/o Rose Katherine Sturm Odendahl, p/o Sharon & Shirley |
| Odendahl | Edward G | 6 May 1915 | 22 Nov 2000 | s/o Albert Edward & Emma C Wieland Odendahl |
| Odendahl | Emma C Wieland | 3 Sep 1886 | 27 Mar 1979 | s/s Albert Edward Odendahl |
| Odendahl | John Edward Sr | 25 Dec 1853 | 9 Apr 1939 | h/o Mary Omelia Ott Odendahl |
| Odendahl | Josephine R | 11 Apr 1894 | 2 Apr 1989 | d/o John Edward Sr & Mary Omelia Ott Odendahl |
| Odendahl | Mary Omelia Ott | 30 Oct 1859 | 1 Aug 1943 | s/s John Edward Odendahl Sr |
| Odendahl | Rose Katherine Sturm | 14 Nov 1915 | 16 Sep 1998 | s/s Arnold R Odendahl |
| Odendahl | Sr M Marie | 5 Sep 1920 | 14 Jan 2005 | |
| O'Donnell | Alyce Constance | 24 Feb 1890 | Seo 1980 | d/o Michael B & Ellen Wall O'Donnell |
| O'Donnell | Amanda Hoeft | 22 May 1879 | 24 Sep 1971 | s/s James C O'Donnell |
| O'Donnell | Ellen Agnes "Nell" | 1 Aug 1879 | 14 Feb 1957 | d/o John & Mary Holland O'Donnell |
| O'Donnell | Ellen Wall | 8 Nov 1865 | 5 Jun 1901 | w/o Michael B O'Donnell |
| O'Donnell | George | 28 Sep 1870 | 17 Aug 1953 | s/o John Jr & Mary Holland O'Donnell |
| O'Donnell | James C. | 1866 | 1933 | h/o Amanda Hoeft O'Donnell |
| O'Donnell | John | 1823 | 14 Jul 1891 | h/o Mary Holland O'Donnell,p/o eleven children |
| O'Donnell | John Jr | 1862 | 1950 | 1st marriage to Mary O'Donnell, 2nd marriage to Nanao B Behan O'Donnell |
| O'Donnell | Martine | 11 Nov 1892 | Aug 1969 | d/o Michael & Ellen Wall O'Donnell |
| O'Donnell | Mary | Aug 1859 | 2 Jul 1919 | |
| O'Donnell | Mary Holland | 2 Feb 1839 | 22 Mar 1925 | w/o mary Holland O'Donnell |
| O'Donnell | Maye J | 17 Oct 1888 | 25 May 1970 | d/o Michael B & Ellen Wall O'Donnell |
| O'Donnell | Michael B | 1861 | 1945 | h/o Ellen Wall O'Donnell, married 14 Sep 1887, p/o Maye, Alyce, Martine |
| O'Donnell | Nanao B Behan | 1868 | 1927 | 2nd wife of John O'Donnell Jr |
| O'Donnell | Timothy | n/d | n/d | |
| O'Donnell | William Francis | 11 Aug 1868 | 20 Dec 1888 | s/o John & Mary Holland O'Donnell |
| O'Driscoll | Agnes Gaul | 1864 | 1949 | w/o Patrick O'Driscoll |
| O'Driscoll | Patrick | 6 May 1860 | 24 Apr 1927 | h/o Agnes Gaul O'Driscoll, married 1 Jun 1891, p/o Mary Regina |
| O'Gorman | Bridget | 23 Nov 1822 | 1 May 1910 | w/o Patrick Thomas O'Gorman, p/o Mary, Michael, John, Thomas |
| O'Herron | Barbara Liewer | 4 Oct 1886 | 19 Dec 1984 | s/s Joseph O'Herron |
| O'Herron | Donald J "Scotty" | 8 Jan 1912 | 12 Nov 1960 | h/o Irene Nell Zitzlsperger O'Herron, p/o Ronald |
| O'Herron | Elizabeth Bromert | 1879 | 30 Aug 1959 | s/s James J O'Herron |
| O'Herron | Ellen | 1836 | 16 Jan 1894 | d/o James & Ellen Cody O'Herron |
| O'Herron | Ellen Cody | 1808 | 1891 | w/o James O'Herron, p/o Ellen, Mary, Margaret, John |
| O'Herron | Ellie | 3 Mar 1887 | 5 Aug 1887 | d/o James & Martha O'Herron |
| O'Herron | Frances "Frank" | 1878 | 17 Jun 1896 | s/o James O'Herron |
| O'Herron | Irene Nell Zitzlsperger | 7 Jul 1911 | 25 Jul 2013 | s/s Donald J "Scotty" & Ronald O'Herron |
| O'Herron | James J | 27 Jul 1876 | 2 Oct 1963 | h/o Elizabeth Bromert O'Herron, married 14 Feb 1906, p/o Leland, Donlad, Edward, John |
| O'Herron | John Francis | 13 Jan 1917 | 1946 | s/o James J & Elizabeth Bromert O'Herron |
| O'Herron | Joseph | 1 Aug 1883 | 12 Aug 1947 | h/o Barbara Liewer O'Herron, married 15 Sep 1914, p/o Mary Katherine, Robert, Mary Jane, Thomas, Francis |
| O'Herron | Margaret | 1842 | 17 Nov 1895 | d/o James & Ellen Cody O'Herron |
| O'Herron | Mary | Aug 1840 | 20 Feb 1911 | d/o James & Ellen Cody O'Herron |
| O'Herron | Ronald | 4 Jul 1935 | 22 Dec 1935 | s/s Donald J "Scotty' & Irene Nell Zitzlsperger O'Heron |
| O'Herron | Theresa | 1889 | 6 Jun 1974 | d/o James & Martha O'Herron |
| Olberding | Chad | | 21 Sep 1970 | s/o Dennis & Delores Olberding |
| Olberding | Gary Leo | 2 Aug 1947 | 19 Jul 1967 | Iowa PFC 555 Engr BN 2 Armd Div |
| Olberding | Gerard | 13 Nov 1957 | 13 Nov 1957 | s/o Merle Ivor & Ruth Gertrude Sapp Olberding |
| Olberding | Kenneth M | 16 Jan 1949 | 21 Dec 2001 | s/o Merle Ivor & Ruth Gertrude Sapp Olberding, f/o Kyle & Kim |
| Olberding | Leona M | 2 Sep 1912 | Jan 1993 | w/o Louis Joseph Olberding |
| Olberding | Louis Joseph | 12 May 1903 | 1961 | h/o Leona M Olberding |
| Olberding | LuVern C | 9 Jul 1920 | 6 Nov 1994 | h/o Modesta Arnett "Chub" Mosman Olberding, married 30 Oct 1943, p/o Dennis, Duane, Gary, John, Kristyne, Randall, Karen, Kathleen, Karla, Keith |
| Olberding | Merle Ivor | 21 Nov 1924 | 1 Jan 2011 | h/o Ruth Gertrude Sapp Olberding, married 18 Sep 1948, p/o Kenneth & Gerard |
| Olberding | Modesta Arnett "Chub" Mosman | 25 Feb 1922 | 23 Oct 2009 | s/s LuVern C Olberding |
| Olberding | Randall E | 26 Nov 1951 | 2 Jun 1996 | s/o LuVer C Olberding & Moodesta Arnett "Chub" Mosman |
| Olberding | Ruth Gertrude Sapp | 29 Nov 1930 | 23 Feb 2008 | s/s Merle Ivor Olberding |
| Olerich | Ann P Huegerich | 16 May 1890 | Mar 1976 | s/s Victor Henry Olerich |
| Olerich | Anna Mae Schroeder | 1892 | 8 Feb 1933 | 1st w/o Herman Joseph Olerich |
| Olerich | Bernice Balk | 27 Jun 1915 | 7 Dec 1951 | s/s Earnest Olerich |
| Olerich | Earnest | 8 Jul 1912 | Aug 1978 | h/o Bernice Balk Olerich, married 2 Jun 1934, p/o Francis, Ronald, Charles, John, Carol |
| Olerich | Frances E "Fanny" Danner | 3 Mar 1891 | 26 Dec 1975 | s/s Frank Olerich |
| Olerich | Frank | 29 Nov 1884 | 18 Jan 1960 | h/o Frances E "Fanny" Danner Olerich, married 8 Feb 1910, p/o Clarence, Earnest, Leonard, Lawrence, Marvin |
| Olerich | Herman Joseph | 22 Dec 1893 | Dec 1972 | 1st marriage to Anna Mae Schroeder Olerich, married 20 Dec 1917, p/o Lois & Bonnie Jean; 2nd marriage Loretta Mary Schroeder Olerich, married 22 Jan 1935, p/o Richard & Tom |
| Olerich | Loretta Mary Schroeder | 23 Aug 1903 | 30 Mar 1969 | 2nd wife of Herman Joseph |
| Olerich | Steven J | 5 Aug 1974 | 3 Sep 1974 | s/o Dean & Paula Olerich |
| Olerich | Thomas Lee | 20 Jul 1942 | 10 Feb 1978 | s/o Herman Joseph & Loretta Mary Schroeder Olerich |
| Olerich | Victor Henry | Mar 1895 | 9 Feb 1949 | h/o Ann P Huegerich Olerich |
| Onken | Cathy | 26 Jan 1951 | n/d | preneed |
| Onken | Daniel | 23 Dec 1957 | n/d | preneed |
| Onken | Dean | 10 Dec 1946 | 13 Dec 1946 | s/o Richard Henry & Luch Mary Bohnekamp Onken |
| Onken | Emmarita Tiefenthaler | 27 Jun 1915 | 8 Dec 2002 | s/s Virgil George Onken |
| Onken | Lucy Mary Bohnenkamp | 26 Jun 1918 | 13 Jun 2004 | s/s Richard Henry Onken |
| Onken | Mary Margaret "Mayme" Riedff | 15 Apr 1891 | 5 Oct 1966 | s/s William Christopher Onken |
| Onken | Myron V | 12 Feb 1951 | 18 Nov 1961 | s/o Virgil George & Emmarita Tiefenthaler Onken |
| Onken | Richard Henry | 19 Oct 1917 | May 1986 | h/o Lucy Mary Bohnenkamp Onken, married 8 Apr 1943, p/o Richard, Dean, Vivan, Alice, Mary, Ann, Jane |
| Onken | Virgil George | 7 Oct 1914 | 30 Oct 1996 | h/o Emmarita Tiefenthaler Onken, married 22 Nov 1939, p/o Darrell, Vern, Larry, Myron |
| Onken | William Christopher | 8 Dec 1888 | 24 Oct 1968 | h/o Mary Margaret "Mayme" Rieff Onken |
| Ortner | Elizabeth Geier | 9 Mar 1902 | 23 Jan 1977 | s/s Fred F Ortner |
| Ortner | Fred F | 12 Jan 1899 | 15 Jun 1983 | h/o Elizabeth Geier Ortner, married 22 Feb 1927, p/o Dale, Lyle, William, Thomas, Nancy, Neil |
| Ortner | Joseph | 9 Mar 1839 | 25 Feb 1926 | h/o Theresa Wingert Ortner, married 9 Feb 1869, p/o Katherine, Peter, John, Rose Ellen, Elizabeth, Frank, Theresa Veronica, Frances Helen, Clara |
| Ortner | Neil C | 10 Jan 1936 | 28 Sep 1946 | s/o Fred F & Elizabeth Geier Ortner |
| Ortner | Theresa Wingert | 30 Jul 1851 | 5 Oct 1936 | w/o Jospeh Ortner |
| Ostbloom | Michael James | 7 Jan 1977 | 1 Mar 2008 | h/o Tara Dillin Ostbloom, married 30 Jul 2004 |
| Osterholt | Christine "Tena" Danner | 26 Feb 1897 | 5 Apr 1931 | w/o Fred Osterholt, married 25 Nov 1920, p/o Paul, Everett, Wayne |
| Osterhout | Catherine Eva | 19 Jul 1865 | 24 Jan 1908 | |
| Osterlink | Mary C | 14 Feb 1905 | 13 Oct 2004 | |
| Oswald | Dennis | | May 1961 | s/o Paul & Darlene Oswald |
| Oswald | Elizabeth | | Aug 1958 | d/o Paul & Darlene Oswald |
| Oswald | Florence M | 30 Jun 1934 | n/d | preneed |
| Oswald | John Henry | 31 Mar 1931 | 20 Feb 2009 | h/o Phyllis M. Sapp Oswald, married 4 May 1957, p/o Jane Joleen, Judy, John, Julie |
| Oswald | Leon P | 8 Nov 1931 | n/d | preneed |
| Oswald | Mary | | Nov 1957 | d/o Paul & Darlene Oswald |
| Oswald | Phyllis M. Sapp | 5 Jan 1936 | 30 Mar 2013 | s/s John Henry Oswald |
| O'Tool | Barbara Louise Schulte | 8 Mar 1895 | 3 May 1972 | w/o Peter Bernard O'Tool |
| O'Tool | Coletta C Schelle | 13 Mar 1903 | 10 Feb 1995 | s/s William Francis O'Tool |
| O'Tool | Daryl J | 29 Nov 1946 | 14 Sep 1996 | h/o Sheila O'Tool, p/o Shaun, Erin, Kevin |
| O'Tool | Kevin D | 8 Oct 1982 | 14 Sep 1996 | s/o Daryl J & Sheila O'Tool |
| O'Tool | Lowell Charles | 25 Jan 1936 | Jun 1980 | p/o Leonard F, Randy C, William C, Belinda Sue |
| O'Tool | Peter Bernard | 21 Nov 1892 | 20 May 1954 | h/o Barbara Louise Schulte O'Tool |
| O'Tool | Rosina Reising | 3 Jul 1918 | 22 Sep 2010 | s/s Wilmer Peter O'Tool |
| O'Tool | William Francis | 26 May 1899 | 16 Dec 1957 | h/o Coletta C Schelle O'Tool; Iowa PVT 5th Army TNG Corps WWI |
| O'Tool | Wilmer Peter | 2 Oct 1914 | 9 Dec 1959 | h/o Rosina Reising O'Tool |
| O'Toole | Barbara Katherine Reinhart | 1870 | 13 Jul 1955 | s/s Edward O'Toole |
| O'Toole | Edward | 27 Jun 1869 | 2 Feb 1937 | h/o Barbara Katherine "Maude" Reinhart O'Toole, married 25 Oct 1898, p/o Loretta, Marie, Martin |
| O'Toole | Marie Rosa | 15 Aug 1902 | Aug 1983 | s/s Martin Earle O'Toole (brother) |
| O'Toole | Martin Earle | 31 Dec 1911 | 25 Oct 1946 | s/s Marie Rosa O'Toole (sister) |
| Otto | Edward H | 11 Sep 1900 | 6 Feb 1959 | h/o Mary Ann Neuerburg Otto, married 22 Nov 1922, p/o Violet, Maxine, Richard, James |
| Otto | Frankie | | 11 Mar 1881 | aged 1 yr 5 mos ? Dys |
| Otto | Gertrude Albertz | 12 Nov 1839 | 19 Dec 1916 | w/o Henry Otto |
| Otto | Henry | 28 Feb 1828 | 2 May 1920 | h/o Gerturde Albertz Otto, married in 1861, p/o Helen, Katherine, Christina, Adolph, Henry, Will, Anne, Michael, Mary |
| Otto | Josie | | 11 Feb 1882 | aged 1 yr 11 mos 13 dys |
| Otto | Kathryn Loretta Dreeszen | 23 Apr 1888 | 8 Jul 1959 | s/s William Theodore Otto |
| Otto | Lezzie | | 17 Nov 1881 | |
| Otto | Mary Ann Neuerburg | 17 Jun 1900 | 9 Oct 1989 | s/s Edward H Otto |
| Otto | William Theodore | 17 Jul 1884 | 12 Jun 1969 | h/o Kathryn Loretta Dreeszen Otto, married 12 Jan 1909, p/o Florence, Alice, Henry L, Viola, Lloyd, Pearl, William C |
| Overmire | Nellie Wolfe | 1853 | 1921 | w/o Joseph S Overmire, married in 1881 |
