Hermann Schüssler or Schussler (1842 -1919) was a German water-systems engineer and architect of dams famous for designing the Comstock water system.

He emigrated to California 1864 and started working for the Spring Valley Water Works of San Francisco. He worked on several projects in the Bay Area. Remarkable projects are the dams at Crystal Springs Reservoir and San Andreas Lake which survived the 1906 San Francisco earthquake.

Schüssler became chief engineer of Marin County, and later of Virginia City. In Virginia City, he worked for Virginia City and Gold Hill Water Company and build the Comstock water system. Schüssler also worked for the Sutro Tunnel Company and designed the water system for Tuscarora and Pioche. In 1878, he worked on several water projects in Hawaii.