| Oakley, Annis Alfred | 13 Apr. 1919 | Dubuque | Miller | 291 | B2531 |
| Oakley, Carlton Joseph | 01 Oct. 1920 | Dubuque | Wagner | 935 | B2532 |
| Oakley, Dean Charles | 15 Oct. 1916 | Dubuque | Wagner | 494 | B2529 |
| Oakley, Grace Agnes | July 23, 1912 | Dubuque | Miller | 476 | B2526 |
| Oakley, Irene Marie | June 3, 1919 | Dubuque | Bauer | 442 | B2531 |
| Oakley, Joseph | 13 Mar. 1916 | Dubuque | Bauer | 489 | B2529 |
| Oakley, Mary Edith | 28 Jan. 1921 | Dubuque | Bauer | 314 | B2533 |
| Oakley, Pearl Marie | 03 Apr. 1916 | Dubuque | Miller | 490 | B2529 |
| Oakley, Walter W. | 28 Oct. 1914 | Dubuque | Kuttler | 472 | B2527 |
| Oberboell, Bernice | June 1, 1914 | Dubuque | Bauen | 470 | B2527 |
| Oberborckling, Hugo Heinrich | 16 Jan. 1912 | Dubuque | Hullermann | 12 | B2525 |
| Oberbrockling, Albert J. | 28 Dec. 1915 | Dubuque | Abeln | 366 | B2828 |
| Oberbrockling, Clarinda M. | 25 Jan. 1910 | Dubuque | Hagemann | 475 | B2524 |
| Oberbrockling, Henry Edgar | 09 Aug. 1910 | Dubuque | Abeln | 271 | B2524 |
| Oberbrockling, Hilda F. | 27 Apr. 1911 | Dubuque | Hagemann | 554 | B2525 |
| Oberbrockling, Julius Anthony | July 1, 1912 | Dubuque | Abeln | 10 | B2525 |
| Oberbrockling, Lawrence Joseph | July 3, 1917 | Dubuque | Hullermann | 377 | B2529 |
| Oberbrockling, Leonard | 16 Oct. 1914 | Dubuque | Hagemann | 467 | B2527 |
| Oberbrockling, Severia | June 15, 1912 | Dubuque | Hagemann | 388 | B2526 |
| Oberbroeckling, Albert J. | 28 Dec. 1914 | Dubuque | Abeln | 469 | B2527 |
| Oberbroeckling, Alois L. | June 22, 1914 | Dubuque | Hullermann | 468 | B2527 |
| Oberbroeckling, Cecilia Alius | July 23, 1919 | Dubuque | Hullersmann | 38 | B2531 |
| Oberbroeckling, Donald Urian | May 4, 1921 | Dubuque | Beckman | 315 | B2533 |
| Oberbroerkling, Viola | 11 Apr. 1918 | Dubuque | Beckmann | 663 | B2530 |
| Oberfoell, Alice A. | 14 Dec. 1915 | Dubuque | Stary | 365 | B2828 |
| Oberfoell, Dora Mae | July 23, 1918 | Dubuque | Sroka | 664 | B2530 |
| Oberfoell, Lorence G. | 12 Nov. 1917 | Dubuque | Story | 374 | B2529 |
| Oberfoell, Maria M. | July 2, 1910 | Dubuque | Rauen | 152 | B2524 |
| Oberfoell, Sylvester Joseph | 08 Nov. 1918 | Dubuque | Simon | 665 | B2530 |
| Oberfoell, Victor Earl | 01 Dec. 1919 | Dubuque | Story | 405 | B2531 |
| Oberhoffer, Joseph Franz | 16 Mar. 1917 | Dubuque | Krueger | 372 | B2529 |
| O'Brien, Byrne | 28 Aug. 1913 | Dubuque | Byrne | 492 | B2527 |
| O'Brien, Cyril Joseph | 11 Aug. 1917 | Dubuque | Byrne | 370 | B2529 |
| O'Brien, Donald | June 12, 1915 | Dubuque | Cavanaugh | 363 | B2828 |
| O'Brien, George Thomas | June 5, 1918 | Dubuque | Callan | 651 | B2530 |
| O'Brien, Janet Rose | 11 Jan. 1918 | Dubuque | Conlin | 652 | B2530 |
| O'Brien, Leroy William | June 7, 1918 | Dubuque | Latimer | 653 | B2530 |
| O'Brien, Mary Ellen | 05 Jan. 1920 | Dubuque | Callan | 71 | B2531 |
| O'Brien, Mary Margaret | July 9, 1917 | Dubuque | Cannon | 379 | B2529 |
| O'Brien, Mary V. | 02 Aug. 1915 | Dubuque | Byrne | 375 | B2828 |
| O'Brien, Raymond | 08 Jan. 1916 | Dubuque | Folker | 499 | B2529 |
| Name | Birth Date | County | Mother's Maiden Name | Certificate # | Box# |
| O'Brien, Robert | 1914 | Dubuque | Couler | 459 | B2527 |
| O'Brien, Thomas Lawrence | 29 Dec. 1920 | Dubuque | Conlin | 1104 | B2532 |
| O'Connell, Francis Kathryn | 07 Mar. 1920 | Dubuque | McGinnes | 297 | B2532 |
| O'Connell, Gerald Anthony | 23 Oct. 1911 | Dubuque | Ryan | 319 | B2525 |
| O'Connell, John Melven | June 26, 1909 | Dubuque | Ryan | 55 | B2523 |
| O'Connell, Katherine | 11 Nov. 1913 | Dubuque | Petry | 488 | B2527 |
| O'Connell, Mary Genevieve | 13 Aug. 1913 | Dubuque | Ryan | 499 | B2527 |
| O'Connell, Rosemary | 15 Dec. 1920 | Dubuque | Kennedy | 1105 | B2532 |
| O'Conner, Elizabeth V. | 22 Apr. 1913 | Dubuque | Atkinson | 497 | B2527 |
| O'Conner, John Frances | June 18, 1917 | Dubuque | Atkinson | 375 | B2529 |
| O'Conner, Margaret O. | 11 Apr. 1917 | Dubuque | McCabe | 380 | B2529 |
| O'Connor (Baby Girl) | May 23, 1914 | Dubuque | Hardy | 458 | B2527 |
| O'Connor, David Francis | 02 Nov. 1913 | Dubuque | Miller | 684.5 | B2527 |
| O'Connor, James Joseph | 07 Jan. 1918 | Dubuque | Lucas | 654 | B2530 |
| O'Connor, John Joseph | 12 Aug. 1918 | Dubuque | Haas | 655 | B2530 |
| O'Connor, Mary Virginia | 07 Mar. 1920 | Dubuque | Haas | 298 | B2532 |
| O'Connor, Richard John | 15 Mar. 1919 | Dubuque | Lucas | 204 | B2531 |
| O'Dell, Mary Lucy | July 24, 1913 | Dubuque | Peterson | 491 | B2527 |
| Odell, Peter Emerson | June 29, 1911 | Dubuque | Petersen | 683.5 | B2525 |
| O'Dell, Robert LaMar | July 16, 1918 | Dubuque | Croker | 656 | B2530 |
| Odermatt, Hazel Lauretta | July 11, 1909 | Dubuque | Short | 75 | B2523 |
| Oellinger, Mary Pauline | 03 Jan. 1919 | Dubuque | Kass | 50 | B2530 |
| Oertel, Bernice A. | 07 Feb. 1920 | Dubuque | Roepsch | 179 | B2531 |
| Oertel, Estella Anna | 01 Aug. 1918 | Dubuque | Roepsch | 666 | B2530 |
| Oertel, Helen Esther | July 12, 1912 | Dubuque | Roepsch | 624 | B2526 |
| Oertel, Martha Maria | 24 Oct. 1913 | Dubuque | Roepsch | 487 | B2527 |
| Oeschger, Louisa Alberta | 31 Jan. 1919 | Dubuque | Schaffer | 51 | B2530 |
| Oeschger, Peter | 01 Sept. 1915 | Dubuque | Hansen | 362 | B2828 |
| Oesinger, Helen J. | May 5, 1915 | Dubuque | Assmussen | 368 | B2828 |
| Oeth, Arthur Herman | 09 Sept. 1912 | Dubuque | Schwab | 527 | B2526 |
| Oeth, Herbert | 17 Apr. 1909 | Dubuque | Schwab | 566 | B2524 |
| Offerman, Charlotte Magdaline | 03 Feb. 1921 | Dubuque | Engel | 316 | B2533 |
| Name | Birth Date | County | Mother's Maiden Name | Certificate # | Box# |
| Oglesby, Donald Joseph | July 5, 1911 | Dubuque | O'Connor | 22 | B2525 |
| Oglesby, George Anthony | 22 Feb. 1917 | Dubuque | Connell | 376 | B2529 |
| O'Halloran, Mathias Harry | July 19, 1909 | Dubuque | Dietrich | 628 | B2524 |
| O'Hara, Clarence Thomas | 29 Dec. 1910 | Dubuque | Fannon | 411 | B2524 |
| O'Hearn, Clarence | May 7, 1919 | Dubuque | Hipman | 365 | B2531 |
| Ohearn, Florence | 16 Mar. 1915 | Dubuque | Duehr | 361 | B2828 |
| Ohearn, James L. | June 22, 1916 | Dubuque | Duehr | 497 | B2529 |
| O'Hearn, Katherine Agnes | 20 Oct. 1918 | Dubuque | Duehr | 657 | B2530 |
| Ohearn, Matthew Alfred | 26 Jan. 1913 | Dubuque | Duehr | 496 | B2527 |
| O'Hearn, Robert Kermit | 14 Mar. 1918 | Dubuque | Hahn | 658 | B2530 |
| O'hearn, Winifred Stella | July 6, 1912 | Dubuque | Duehr | 6 | B2525 |
| Ohlnes, Harold William | 26 Feb. 1920 | Dubuque | Ohlnes | 180 | B2531 |
| Ohlsen, Edward Elleworth | 24 Oct. 1910 | Dubuque | Strait | 392 | B2524 |
| Ohnesorg, Clifford | 04 Oct. 1918 | Dubuque | Schonburger | 667 | B2530 |
| Ohnesorge, Ralph | May 25, 1910 | Dubuque | Voelker | 574 | B2524 |
| Ohnesorge, William | 03 Mar. 1909 | Dubuque | Schonberger | 535 | B2524 |
| Oldridge, Donald Leroy | June 7, 1911 | Dubuque | Sauer | 146 | B2525 |
| Oldridge, Helen Emma | July 19, 1913 | Dubuque | Saner | 490 | B2527 |
| Olds, Donald James | 06 Aug. 1918 | Dubuque | Pfohl | 668 | B2530 |
| Olds, George Walter | 25 Mar. 1919 | Dubuque | Fisk | 205 | B2531 |
| Oldson, Betty | 13 Apr. 1920 | Dubuque | Oldson | 402 | B2532 |
| O'Leary, Anne | 16 Sept. 1918 | Dubuque | Kabat | 659 | B2530 |
| O'Leary, Arthur John | June 2, 1911 | Dubuque | Kessler | 41 | B2525 |
| O'Leary, Donald Dennis | 20 Nov. 1919 | Dubuque | Clarke | 322 | B2531 |
| O'Leary, Dorothy Eileen | 20 Nov. 1919 | Dubuque | Clark | 323 | B2531 |
| O'Leary, James Joseph | 19 Mar. 1920 | Dubuque | Kabot | 299 | B2532 |
| Olesan, Rose | 28 Feb. 1914 | Dubuque | Gustason | 455 | B2527 |
| Olinger, Catherine | May 29, 1913 | Dubuque | Kass | 500 | B2527 |
| Olinger, Francis Mary | 14 Dec. 1909 | Dubuque | Galle | 279 | B2523 |
| Olinger, Joseph | 09 Jan. 1915 | Dubuque | Kass | 364 | B2828 |
| Oller, Roy | 29 Aug. 1916 | Dubuque | Pochter | 491 | B2529 |
| Ollinger, Martha Mary | 19 Dec. 1920 | Dubuque | Kass | 1106 | B2532 |
| Name | Birth Date | County | Mother's Maiden Name | Certificate # | Box# |
| Olmsted, Charles W. | 17 Sept. 1918 | Dubuque | Denlinger | 669 | B2530 |
| Olson, LaVerne Julius | 10 Aug. 1918 | Dubuque | Yerg | 670 | B2530 |
| O'Mara, Geneive | 15 Oct. 1917 | Dubuque | Fildler | 371 | B2529 |
| O'Mara, Hilda B. | 10 Jan. 1914 | Dubuque | Fiedler | 462 | B2527 |
| O'Mara, Katherine Janette | 13 Apr. 1918 | Dubuque | Bitters | 660 | B2530 |
| O'Meara, Clemont P. | 16 Sept. 1914 | Dubuque | Kennedy | 456 | B2527 |
| O'Meara, Genevieve Elizabeth | 28 Apr. 1919 | Dubuque | Hill | 292 | B2531 |
| O'Meara, John P. | 16 Sept. 1909 | Dubuque | Hill | 179 | B2523 |
| O'Meara, Leo Francis | 28 Apr. 1919 | Dubuque | Hill | 293 | B2531 |
| O'Meara, Mary Lucille | June 30, 1920 | Dubuque | Bitters | 547 | B2532 |
| O'Meara, Rose Ralph | 20 Jan. 1916 | Dubuque | Hill | 501 | B2529 |
| O'Meara, Vincent Bernard | 23 Mar. 1912 | Dubuque | Hill | 262 | B2526 |
| O'Meara, Walter J. | 17 Aug. 1912 | Dubuque | Kennedy | 244 | B2526 |
| Omiela, Clarence | 15 Oct. 1909 | Dubuque | Wilke | 530 | B2524 |
| Onderkirk, William M. | 05 Sept. 1915 | Dubuque | Onderkirk | 367 | B2828 |
| O'Neill, Cletus Edward | 03 Nov. 1912 | Dubuque | Spangler | 626 | B2526 |
| O'Neill, Evelyn L. | June 9, 1914 | Dubuque | Love | 461 | B2527 |
| O'Neill, Regis James | June 18, 1914 | Dubuque | O'Neill | 460 | B2527 |
| O'Neill, Thomas Clair | 06 Mar. 1920 | Dubuque | Traversey | 300 | B2532 |
| Oneyear, Amie Elta | 16 Dec. 1915 | Dubuque | Suderland | 376 | B2828 |
| Oneyear, Charles Jefferson | 02 Aug. 1911 | Dubuque | Clark | 656 | B2525 |
| Oneyear, Dorothy Evelyn | 12 Sept. 1909 | Dubuque | Clark | 453 | B2523 |
| Oneyear, Levi Jefferson | 12 Jan. 1912 | Dubuque | Sunderland | 126 | B2526 |
| Oneyear, Merrill | 01 Dec. 1914 | Dubuque | Bakey | 457 | B2527 |
| O'Niel, Dorothy Mary | 29 Oct. 1916 | Dubuque | Hartness | 495 | B2529 |
| O'Niel, John William | June 15, 1920 | Dubuque | Hail | 548 | B2532 |
| O'Regan, Marian | 11 Mar. 1920 | Dubuque | McDonough | 301 | B2532 |
| O'Regan, Timothy Thomas | 21 Apr. 1921 | Dubuque | McDonough | 317 | B2533 |
| O'Rourke, Adelia | 26 Oct. 1915 | Dubuque | Fitzgibbons | 374 | B2828 |
| O'Rourke, Adeline | 14 Feb. 1911 | Dubuque | Gogman | 3 | B2525 |
| O'Rourke, Charles A. | 04 Sept. 1919 | Dubuque | Fitzgibbons | 172 | B2531 |
| O'Rourke, Claire E. | 19 Sept. 1915 | Dubuque | Herkes | 371 | B2828 |
| Name | Birth Date | County | Mother's Maiden Name | Certificate # | Box# |
| O'Rourke, Clement Joseph | 29 Nov. 1919 | Dubuque | Miller | 324 | B2531 |
| O'Rourke, John J. | 03 Aug. 1915 | Dubuque | Miller | 373 | B2828 |
| O'Rourke, Mary Doris | 26 Dec. 1913 | Dubuque | Fitzgibbons | 494 | B2527 |
| O'Rourke, Melvin J. | 12 Jan. 1918 | Dubuque | Fitzgibbons | 662 | B2530 |
| O'Rourke, Merlin F. | 12 Jan. 1918 | Dubuque | Fitzgibbons | 661 | B2530 |
| Orr, Donald | 17 Sept. 1912 | Dubuque | McQuillen | 38 | B2525 |
| Orris, Mariane Wealthy | 11 Mar. 1920 | Dubuque | Waters | 302 | B2532 |
| Orvis, Marjorie L. | 23 Nov. 1916 | Dubuque | Watters | 498 | B2529 |
| Osbor, Joseph | 24 Nov. 1918 | Dubuque | Zach | 671 | B2530 |
| O'Shea, Mary Rosa | 29 Mar. 1911 | Dubuque | Tierney | 408 | B2525 |
| Oster, Aurella L. | 07 Aug. 1915 | Dubuque | Chihak | 369 | B2828 |
| Oster, Verginia Mary | 30 Nov. 1920 | Dubuque | Sassen | 1013 | B2532 |
| Osterberger, Alvin August | May 15, 1910 | Dubuque | Vogel | 408 | B2524 |
| Osterberger, Elden Lawrence | May 15, 1910 | Dubuque | Vogel | 407 | B2524 |
| Osterhaus, Catherine Bernice | 29 Oct. 1912 | Dubuque | Liebold | 66 | B2525 |
| Osterhaus, Clarinda | 12 Nov. 1913 | Dubuque | Ovel | 498 | B2527 |
| Osterhaus, Cletus | July 16, 1918 | Dubuque | Orel | 673 | B2530 |
| Osterhaus, Evelyn Leona | 22 Apr. 1920 | Dubuque | Oral | 403 | B2532 |
| Osterhaus, Francis Cecela | 22 Nov. 1916 | Dubuque | Leibold | 488 | B2529 |
| Osterhaus, John Bernard | 28 Oct. 1918 | Dubuque | Leibold | 674 | B2530 |
| Osterhaus, Joseph Louis | May 17, 1921 | Dubuque | Leibold | 318 | B2533 |
| Osterhaus, Loarine | 01 Nov. 1914 | Dubuque | Leibold | 463 | B2527 |
| Osterhaus, Sylereria Mary | 15 Jan. 1918 | Dubuque | Kramer | 672 | B2530 |
| Osterhaus, Sylvia K. | 06 Aug. 1916 | Dubuque | Ovel | 496 | B2529 |
| Osterhoff, Aloysius Bernard | 28 Sept. 1916 | Dubuque | Terfruchte | 493 | B2529 |
| Osterhoff, Helen Elizabeth | 16 Oct. 1912 | Dubuque | Schweching | 587 | B2526 |
| Osterhoff, Joseph Ignatius | 01 Mar. 1911 | Dubuque | Schwietering | 149 | B2525 |
| Osterhous, Arthur S. | 27 Dec. 1914 | Dubuque | Kramer | 465 | B2527 |
| Osterhouse, Isobel | May 11, 1919 | Dubuque | Kramer | 366 | B2531 |
| Osterhouse, Viola | 02 Aug. 1910 | Dubuque | Krammer | 191 | B2524 |
| Ostminkle, Katryne J. | 20 Nov. 1916 | Dubuque | Funke | 500 | B2529 |
| Ostrowsky, Martin | 19 Dec. 1920 | Dubuque | Kaplan | 1107 | B2532 |
| Name | Birth Date | County | Mother's Maiden Name | Certificate # | Box# |
| Ostwenkel, Dolores | 25 Dec. 1914 | Dubuque | Funke | 466 | B2527 |
| Ostwinkle, Helen | 03 Aug. 1911 | Dubuque | Kramer | 364 | B2525 |
| Ostwinkle, Lucile | 01 Apr. 1911 | Dubuque | Funke | 518 | B2525 |
| Ostwinkle, Margurite | 26 Mar. 1919 | Dubuque | Feneke | 206 | B2531 |
| Ostwinkle, William Lawrence | 10 Mar. 1921 | Dubuque | Funke | 319 | B2533 |
| Oswald, Anthony A. | 12 Feb. 1915 | Dubuque | Lesch | 372 | B2828 |
| Oswald, Arleene Janan | 26 Mar. 1918 | Dubuque | Karsch | 675 | B2530 |
| Oswald, Bernice Hilda | 12 Dec. 1919 | Dubuque | Marsch | 406 | B2531 |
| Oswald, Charles Henry | 11 Sept. 1910 | Dubuque | Wiemold | 435 | B2524 |
| Oswald, Clarence Joseph | 17 Mar. 1912 | Dubuque | Elmer | 595 | B2526 |
| Oswald, Cletes Frances | 15 Nov. 1913 | Dubuque | Lesch | 493 | B2527 |
| Oswald, Cyril Henry | 06 Mar.1920 | Dubuque | Betche | 303 | B2532 |
| Oswald, Earl Frederick | 05 Oct. 1909 | Dubuque | Boetke | 206 | B2523 |
| Oswald, Earl Frederick | 05 Oct. 1909 | Dubuque | Boetke | 237 | B2523 |
| Oswald, Ethel Frances | 27 Aug. 1913 | Dubuque | Tierney | 501 | B2527 |
| Oswald, Francis Donald | July 31, 1915 | Dubuque | Tierney | 360 | B2828 |
| Oswald, Glydin Elizabeth | 05 Oct. 1909 | Dubuque | Boetke | 207 | B2523 |
| Oswald, Glydis Elizabeth | 05 Oct. 1909 | Dubuque | Boetke | 238 | B2523 |
| Oswald, Helen Carmilla | 08 Feb. 1919 | Dubuque | Oswald | 116 | B2530 |
| Oswald, Lee Robert | 29 Jan. 1919 | Dubuque | Faust | 52 | B2530 |
| Oswald, Margaret | 06 Feb. 1910 | Dubuque | Werner | 538 | B2524 |
| Oswald, Mary | May 16, 1921 | Dubuque | Lesch | 320 | B2533 |
| Oswald, Wilfred | 06 Oct. 1911 | Dubuque | Oswald | 587 | B2525 |
| O'Toole, Elizabeth H. | 04 Apr. 1913 | Dubuque | Knockel | 489 | B2527 |
| O'Toole, Frank Walter | 03 Mar. 1919 | Dubuque | Kuochel | 207 | B2531 |
| O'Toole, John Joseph | 26 Jan. 1919 | Dubuque | Gantenbein | 53 | B2530 |
| O'Toole, Roger Andrew | June 21, 1920 | Dubuque | Gantenbein | 569 | B2532 |
| Ott, Gertrude J. | 10 Oct. 1910 | Dubuque | Meuser | 637 | B2524 |
| Ott, Milton Lyle | 14 Feb. 1913 | Dubuque | Cartigny | 495 | B2527 |
| Ottari, Carlo | 28 Dec. 1920 | Dubuque | Perfen | 1108 | B2532 |
| Otting, Anita Clara | 04 Apr. 1911 | Dubuque | Ressler | 282 | B2525 |
| Otting, Helen Catherine | 20 Dec. 1919 | Dubuque | Ressler | 407 | B2531 |
| Name | Birth Date | County | Mother's Maiden Name | Certificate # | Box# |
| Otting, Joseph Paul | June 18, 1917 | Dubuque | Ressler | 378 | B2529 |
| Otting, Marie | 26 Aug. 1914 | Dubuque | Resseler | 464 | B2527 |
| Otting, Monica | 22 Jan. 1916 | Dubuque | Ressler | 487 | B2529 |
| Otting, Ralph Henry | 11 Dec. 1918 | Dubuque | Ressler | 676 | B2530 |
| Ottman, Arnold Andrew | June 26, 1920 | Dubuque | Ward | 549 | B2532 |
| Otto, Annette | June 18, 1915 | Dubuque | Knapp | 370 | B2828 |
| Otto, Bernice Marie | 25 Oct. 1911 | Dubuque | Beyer | 119 | B2525 |
| Otto, Frances | July 14, 1916 | Dubuque | Knopp | 492 | B2529 |
| Otto, Harold | 06 Feb. 1917 | Dubuque | Beyer | 373 | B2529 |
| Otto, Marie | 24 Feb. 1919 | Dubuque | Knopp | 117 | B2530 |
| Ouderkirk, Francis Lloyd | May 5, 1910 | Dubuque | Walling | 242 | B2524 |
| Oxley, Glenn Louis | 28 Aug. 1920 | Dubuque | Gower | 740 | B2532 |
| Oyen, Agnes Christina | July 14, 1912 | Dubuque | Lange | 558 | B2526 |
| Oyen, Cletus | 17 Oct. 1914 | Dubuque | Lange | 471 | B2527 |
| Oyen, Rita Anna | 28 Aug. 1919 | Dubuque | Simon | 105 | B2531 |