- Ohio. Board of Canal Fund Commissioners1
- Ohio. State Highway Commission.1
- Olney, J. (Jesse), 1798-18721
- Osborne, Robert H.1
- Perkins, C. E. (Charles Elliott), 1840-19071
- Peters, William E. (William Edwards), 1857-19521
- Pfannehecker, D.1
- Roeser, C. (Charles), compiler.1
- Row, W. C.1
- Schneider, Allan F. (Allan Frank),1926-cartographer.1
- Schumacher, Gregory A.1
- Shearrow, George G.1
- Sherman, C. E. (Christopher Elias), 1869-19401
- Sherman, C. E. 1869-19401
- Smith, Robert W.1
- Stedman, Brown & Lyon.1
- Stiles, Sherman & Smith, engraver.1
- Strong, Ezra Baldwin, 1805-18461
- Sturgeon, Myron Thomas, 1908-1
- Sugar, David J.1