| Name | Location | Year(s) | Notes |
| Albright, O. K. | Myerstown | 1886 | |
| Alexander Studios | Lebanon | 1938 - 1946+ | |
| Anspach, WIlliam S. | Lebanon | 1911 - 1915 | |
| Atkins, George L. | Lebanon | 1849 | |
| Atkins, W. M. | Lebanon Schaefferstown |
1855 | |
| Aunspach, J. S. | Lebanon | prob. 1860 - 1880's | Carte de Visit |
| Bair, Levi K. | 1897 - 1898 | Maybe as early as 1876 | |
| Bender, William Henry | Fredericksburg | Possibly not professional | |
| Berger and Herbst | Lebanon | 1893 - 1894 | |
| Bishop | Lebanon | ||
| Blazier, Milton Blazier Studies Blazier and Miller |
Lebanon | 1901 - 1940 | |
| Blatt, C. G. | traveling | ||
| Blecker, Aaron M. | Myerstown | 1863 - 1898 | |
| Boston Studios | Lebanon | ||
| Brenner's | Lebanon | 1858 - 1862 | |
| Brensinger, Frank | traveling artist | ||
| Caufman and Townsend | Lebanon | ||
| Cole, S. A. | Lebanon | 1897 - 1898 | |
| Collins, W. I. E. | Myerstown | ||
| Commings, Byron | Lebanon | ||
| Daily, John | Lebanon | 1857 - 1869 | |
| Dettra, Harvey | Lebanon | 1905 - 1916 | |
| Elite Studios | Lebanon | 1898 - 1899 | |
| Ernst | Lebanon | Maybe as early as 1876 | |
| Excelsior Gallery | Lebanon | Successor to J. W. Graeff | |
| Freeman, J. R. | 1901 | ||
| Fawler | Myerstown | ||
| Fowler, E. B. | Lebanon | 1866 | |
| Gantz, J. Edward | Lebanon | 1933 - 1946+ | |
| Garmer, Harvey | Lebanon | 1915 | |
| Gassert, William B. | Lebanon | 1933 - 1946+ | |
| Gates, Charles R. | Lebanon | 1903 - 1929 | |
| Groh, R. C. | Lebanon | ||
| Graeff, John W. | Lebanon | 1868 - 1888 | |
| Harpel, Luther W. | Lebanon | 1901 - 1946+ | |
| Hartman, Joseph | Lebanon | 1850 | |
| Hauer, Elmer E. | Lebanon | 1883 - 1888 | |
| Heiss, William H. | Jonestown | 1869 | |
| Herbst, R. H. | Lebanon | 1900 | |
| Holtzman | Myerstown | ||
| Hoopman, H. Raymond | Lebanon | 1945 - 1946+ | |
| Humer-Spohn Studio | Palmyra | 1940's | |
| Jenkins, Robert L. | Lebanon | 1883 - 1901 | |
| Keim (Kime), John | Lebanon | 1851 - 1880 | Bought out C. Smith |
| Keller, William H. | Lebanon | 1869 - 1915? | |
| Keller, William | Myerstown | 1863 | |
| Keller and Mohn | Lebanon | 1908 - 1916 | |
| Kemp, H. A. | Fredericksburg | 1908 - 1916 | |
| Ketchledge | Lebanon | ||
| Keystone Studio | Lebanon | ||
| Klink, Thomas W. | Lebanon | 1925 - 1931 | |
| Koffenhaffer, Herbert | |||
| Kramer, Israel | Seltzerville | 1857 | |
| Lantz, M. C. | Lebanon | 1866 - 1868 | |
| Lauber, A. | Lebanon | 1857 | |
| Lauser, David D. | Palmyra | 1924 - 1925 | |
| Light, Theophilius O. | Lebanon | 1883 - 1889 | |
| Lineaweaver, Harvey | Campbelltown | 1914 | |
| Maxwell, A. W. | Lebanon | 1903 | |
| McKnight Studios | Lebanon | 1893 - 1901 | |
| Miller, Charles W. | Myerstown | of Blazier and Miller | |
| Miller, John H. K. | Lebanon | 1911 | |
| Mohn, John W. | Lebanon | 1915 | of Keller and Mohn |
| Murray, C. J. I. | Myerstown | 1860's | |
| Nagle, George W. | Lebanon | 1933 - 1940 | |
| O'Neill, Emmett III | Lebanon | 1938 - 1940 | |
| Paul's Mammoth Traveling Photo Car | |||
| Quimby, Frank L. | Lebanon | about 1883 - 1884 | |
| Raber, David C. | Lebanon | 1852 | |
| Reinhart, Joseph | Lebanon | January 1847 | Worked for about two weeks |
| Rise and Gates | Lebanon | 1896 - 1901 | |
| Ritter, Morris G. | Lebanon | 1899 - 1913 | |
| Roshon, Christian S. | Lebanon | 1889 - 1899 | Worked in many locations in Pennsylvania |
| Rosser | Lebanon | of Gates and Rosser | |
| Sanderson | Lebanon | ||
| Saylor, Harry C. | Myerstown | ||
| Schartel, E. E. | Lebanon | 1885 - 1893 | |
| Schell | Myerstown | ||
| Siegrist, O. B. | Myerstown Lebanon |
1867 | Bought out Spengler |
| Smith, C. | Annville | 1864 | |
| Smith, Jacob | Lebanon | 1869 | |
| Speicher, J. M. | Annville | 1885 - 1901 | |
| Spengler, J. A. | Lebanon | 1865 - 1867 | |
| Steiner, J. H. | Lebanon | 1857 - 1858 | |
| Steinmetz, C. M. | Lebanon | 1888 - 1889 | |
| Stetley, Edward | Lebanon | 1911 - 1916 | |
| Tiffany Studio | 728 Cumberland Street Lebanon |
Postcard | |
| Townsend | of Cauftman and Townsend | ||
| Ulrich, Paul D. | Lebanon | 1921 - 1938 | |
| Wolever, P. W. | Myerstown | ||
| Wolfe, Lee E. | Lebanon | 1895 - 1946 | |
| Wolfe, L. H. | |||
| Wolfe, U. Grant | 1915 | Worked with Lee H. Wolfe | |
| Wolfe and Pieffer | |||
| Wonders, Newton M. | Lebanon | 1887 - 1896 | |
| Zimmerman, William | Lebanon | 1863 - 1864 |