| Co. | Organized | Reorg. | Location | Strength Sept. 30, 1902 | Capt. | First Lieut. | Second Lieut. |
| A | Jan. 23, 1869 | Dec. 6, 1898 | Milwaukee | 49 | ----- | Guy D. Armitage | ----- |
| B | Apr. 25, 1889 | Dec. 9, 1898 | Ft. Atkinson | 57 | G. W. Garlock | John Mueller | Robt. L. Heide |
| C | July 7, 1877 | Nov. 28, 1898 | Whitewater | 56 | Severt J. Olson | ----- | H. J. Cadman |
| D | July 26, 18_8 | ----- | Milwaukee | 61 | Wm. Mehl | F. Meske | H. W. Beimdieke |
| E | Oct. 24, 1889 | May 1, 1899 | Milwaukee | 63 | Martin D. Imhoff | Gardner E. Bacon | John G. Pohler |
| F | Apr. 28, 1889 | June 12, 1899 | Milwaukee | 65 | Robt. J. Parks | Robt. T. Lawson | Jas. Callahan |
| G | Mar. 24, 1875 | Dec. 22, 1888 | Madison | 62 | J. W. O'Connell | Geo. F. O'Connell | Martin J. Olson |
| H | Mar. 30, 1882 | Nov. 29, 1898 | Monroe | 66 | Fred. W. Buehler | Frank H. Shriner | Chas. H. Welton |
| I | Feb. 27, 1902 | ----- | Neenah | 68 | J. B. Schneller | Wm. Weaver | Ralph W. E. Dietz |
| K | Aug. 24, 1877 | Dec. 12, 1898 | Milwaukee | 57 | S. E. Piasecki | ----- | Leo S. Kasak |
| L | May 10, 1900 | ----- | Beloit | 57 | R. P. M. Rossman | J. A. Armstrong | ----- |
| M | July 27, 1898 | ----- | Oconomowoc | 66 | E. M. Webb | P. Hanson | O. Schoen |
| Rank. | Name. | Residence. | Date of Rank. |
| Colonel | George H. Joachim | Madison | Jan. 2, 1906 |
| Lieutenant Colonel | Daniel A. Stearns | Monroe | Jan. 2, 1906 |
| Majors | Oliver E. Lewis | Milwaukee | May 12, 1905 |
| John P. Joachim | Madison | Feb. 21, 1906 | |
| Peter Piasecki | Milwaukee | May 21, 1906 | |
| Adjutant -- Captain | Earl L. Driver | Madison | Jan. 19, 1907 |
| Quartermaster -- Captain | Paul G. Hirtz | Milwaukee | Feb. 17, 1906 |
| Commissary -- Captain | Irving A. Fish | Madison | June 25, 1903 |
| Chaplain -- Captain | Herbert H. Jacobs | Milwaukee | June 11, 1898 |
| Battalion Adjutants -- 1st Lieutenants | Otto W. Geyer | Milwaukee | Jan. 13, 1904 |
| W. Smith, Jr. | Madison | Mar. 10, 1906 | |
| Battalion Quartermasters and Commissaries -- 2nd Lieutenants | Alfred E. Gaartz | Waukesha | June 28, 1901 |
| Paul Ahnert | Milwaukee | July 7, 1903 | |
| Arthur M. Webb | Fort Atkinson | Feb. 21, 1906 |