Single-family detached home
free-standing residential building
Robert William Roper House
Robert and Phyllis Scott House
Robert and Rae Levin House
Rock House
Rockwell House
Rockwood Museum and Park
Rocky Mills
Roop's Fort
Roscoe Conkling House
Roscoe Hersey House
Rose Mont
Rose Seidler House
Rosebush House
Roseland Cottage
Rosenbaum House
Rowan Oak
Roy A. and Gladys Westbrook House
Rucker House
Rufer House
Rufus Arndt House
Rufus C. Holman House
Russell House
Russell Octagon House
Ryan House
S. C. Mayer House
S. T. Elliott House
Salisbury House
Salisbury House
Sally Watson House
Sam Rayburn House Museum
Samuel F. Glass House
Samuel Gridley and Julia Ward Howe House
Samuel Hannaford House
Samuel Penney House
Samuel Simpson House
Samuel Taylor Suit Cottage
Samuel Tenney House
Samuel Wadsworth Russell House
Sandusky County Jail and Sheriff's House
Sarah Whitman Hooker House
Sayre House
Scarlet Oaks
Scripps Hall
Sears Catalog Home
Seeberger-Loring-Kilburn House
Sellers House
Sen. William P. Frye House
Sennett and Bertha Kirk House
Seth E. Ward Homestead
Severin Miller House