| Third Iowa Infantry Mustered into service at Keokuk, Iowa, June 10, 1861 Mustered out at Louisville, Kentucky, July 12, 1865 |
| Company D | ||||||||
| Allen, Albert J. | Hesper | Died Aug. 7, 1861, Brookfield, Missouri | ||||||
| Anderson, Ole A. | Lieutenant | |||||||
| Armstrong, Zumari | Hesper | |||||||
| Barrett, Washington | Orleans Township | |||||||
| Bartholomew, Chauncy F. | Decorah | |||||||
| Blackman, James M. | Freeport | |||||||
| Brace, William H. | Burr Oak | |||||||
| Bridge, Jonathan | Castalia | |||||||
| Brown, Calvin | Locust | |||||||
| Bunt, George | Glenwood Township | |||||||
| Brudick, Charles W. | Lieutenant | Freeport | ||||||
| Camp, Seth T. | Freeport | |||||||
| Crandall, Horace E. | Decorah | |||||||
| Culver, George | Freeport | |||||||
| Decow, Harry R. | Lieutenant | |||||||
| Daskam, Hiram S. | Decorah | |||||||
| Daskam, James S. | Decorah | |||||||
| Dean, Orville E. | Decorah | |||||||
| Dennis, Phieneas M. | Castalia | |||||||
| Dinger, Reuben | Locust | Died Oct 1, 1864, Rome, Georgia | ||||||
| Drake, Aaron K. | Freeport | |||||||
| Eastanson, Haldor | Glenwood Township | |||||||
| Egge, Gilbert E. | Madison Township | Drowned Oct 26, 1862 while bathing in Wolf River | ||||||
| Egge, John E. | Madison Township | |||||||
| Ellingson, Sever | Canoe Township | |||||||
| Esty, Wilbur F. | Castalia | |||||||
| Farber, Joseph | Decorah |
Wounded at Shiloh, Tennessee; Died May 26, 1862 |
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| Farnsworth, Edwin M. | Decorah | |||||||
| Fisher, John | Decorah | |||||||
| Gjertson, Gjetle | Canoe Township | |||||||
| Green, Henry | Decorah | |||||||
| Grove, Hans A | Madison Township | |||||||
| Gulbrandson, Hans | Decorah | |||||||
| Gurney, Charles W | Captain | |||||||
| Harmon, John | Canoe Township | |||||||
| Hauprichs, Nicholas | Decorah | |||||||
| Hazen, Elmore | Frankville | |||||||
| Heckert, William B | Freeport | |||||||
| Hendrickson, William J. | Freeport | |||||||
| Jacobson, John M. | Madison Township |
Died Sep 23, 1861at Cameron, Missouri |
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| Jeffers, Samuel | Decorah | Died of wounds Aug 2, 1863, Vicksburg, Mississippi | ||||||
| Running, Halvor Johnson | Springfield Township | |||||||
| Kellog, Mathew | Freeport | |||||||
| Kellog, Zera W. | Freeport | |||||||
| Kelly, George H. | Decorah |
Died of wounds received at Shilo, Sept 10, 1863. |
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| Kelly, Thomas | Decorah |
Died of wounds Jul 6, 1863, Vicksburg, Mississippi |
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| Kightlinger, Abraham | Decorah | |||||||
| Knapp, Edward | Decorah |
Killed in action April 6, 1862 at Shiloh, Tennessee, |
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| Knox, Frederick W. | Decorah | |||||||
| Knutson, Knut | Decorah | |||||||
| Knutson, Gilbert | Decorah | |||||||
| Lamb, Lafayette | Burr Oak | Died at Brookfield, MO, Sep 7, 1861 | ||||||
| Larson, Peter | Decorah | |||||||
| Lynch, John | Decorah | |||||||
| McKay, Cyrus | Decorah | |||||||
| Mckay, George | Frankville | |||||||
| McMurtie, Abner J. | Lieutenant | Decorah |
Died of wounds Jul 25, 1863, Vicksburg, Mississippi |
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| Miller, William B. | Decorah |
Killed in action Sep 17, 1861, Blue Mills, Missouri |
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| Nelson, Hans A. | Decorah | |||||||
| Odell, Charles W. | Burr Oak |
Died Apr 20, 1862, Jefferson Barracks, MO |
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| Oleson, Edward | Springfield Township | |||||||
| Olson, Carl | Decorah | |||||||
| Peterson, Knut | Freeport |
Died Dec 21, 1861, St. Louis, Missouri |
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| Ray, Robert | Frankville | |||||||
| Robinson, Sylvester | Freeport | |||||||
| Ross, Milton | Decorah | |||||||
| Sheridan, John | Decorah | |||||||
| Shegrud, Martin Olson | Frankville | Died of wounds Oct 17, 1862, Bollivar, Tennessee | ||||||
| Symms, William W. | Burr Oak |
Died Sep 18, 1864, Andersonville Prison, Georgia |
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| Skeim, Peter B Halvorson | Glenwood Township | |||||||
| Smith, Samuel D. | Glenwood Township |
Killed in action Apr 7, 1862, Shiloh, Tennessee |
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| Stenson, Hans H. | Decorah |
Killed in action Apr 6, 1862, Shiloh, Tennessee |
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| Thoreson, Andrew | Decorah | |||||||
| Walrath, Wilder M. | Castalia | |||||||
| Watson, Charles C. | Madison Township |
Arm amputated at Hatchie River, Tennessee, 1862 |
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| Weiser, Emeillus I. | Captain | Decorah | ||||||
| Wesley, John | Castalia | |||||||
| Willett, George R. | Captain | Decorah | ||||||
| Wise, Danniel | Locust | |||||||
| Wise, Elijah | Locust | |||||||
| Wreeland, Levi W. | Madison Township | |||||||