Built during 1930s

Redwood Tree Service Station (Mendocino County, California)
Service station built from a single redwood tree in 1936
Reedsburg Municipal Hospital (Sauk County, Wisconsin)
Former hospital now serving as senior residences
Rees Theater (Marshall County, Indiana)
Art Deco Style theater in Downtown Plymouth
Regal Theater (Philadelphia County, Pennsylvania)
Regency Lido Theatre (Orange County, California)
Regency Suspension Bridge (Mills County, Texas)
Suspension bridge over Colorado River on CR 433
Regent Apartments (Multnomah County, Oregon)
Regent Square Theater (Allegheny County, Pennsylvania)
Reginald Parsons Dead Indian Lodge (Jackson County, Oregon)
Reginald Sinclaire House (Douglas County, Colorado)
Region Nine Training School (Vilas County, Wisconsin)
An educational campus now housing Trees for Tomorrow
Region Six Personnel Training Station (Skamania County, Washington)
Rein School (Noble County, Oklahoma)
Reinhardt-Craig House, Kiln and Pottery Shop (Lincoln County, North Carolina)
Historic country home and furnace in Lincoln County, NC
Relic Hall (Franklin County, Idaho)
Remount Ranch (Laramie County, Wyoming)
Renville County Courthouse (Renville County, North Dakota)
Renwick Generating Plant (Humboldt County, Iowa)
Republic County Courthouse (Republic County, Kansas)
Reservoir Avenue Sewage Pumping Station (Providence County, Rhode Island)
Residential Area District (Edmonson County, Kentucky)
Rex Theater (Escambia County, Florida)
Reynolds Arcade (Monroe County, New York)
Rhode Island State Airport Terminal (Kent County, Rhode Island)
Rhodes Medical Arts Building (Pierce County, Washington)
Rialto Cinemas (Contra Costa County, California)
Rialto Theater (Bee County, Texas)
Rialto Theater (San Patricio County, Texas)
Rialto Theater (Aitkin County, Minnesota)
Rice Apartments (Lane County, Oregon)
Rich-Schwartz Building (Davidson County, Tennessee)
Richard and Dion Neutra VDL Research House II (Los Angeles County, California)
Richard Cattle Auction Barn (Vermilion Parish, Louisiana)
Richard E. Dill House (Thayer County, Nebraska)
Richardson Avenue School (Gloucester County, New Jersey)
Richlands Theater (Onslow County, North Carolina)
Richmond Community Building (Cache County, Utah)
Richmond Theater (Richmond County, North Carolina)
Ricker Pond State Park (Caledonia County, Vermont)
Ridge Hill High School (Saluda County, South Carolina)
Historic African-American school in Ridge Spring, SC
Riegel Ridge Community Center (Hunterdon County, New Jersey)
Riggs Spring Fire Trail (Garfield County, Utah)
Rim Rock Drive Historic District (Mesa County, Colorado)
Rio Grande Bridge at Radium Springs (Dona Ana County, New Mexico)
Rio Grande Southern Motor No. 5 (Montezuma County, Colorado)
A motor vehicle converted to run on railroad track.
Rio Grande Southern Railroad, Motor No. 2 (Jefferson County, Colorado)
Rio Puerco Bridge (Bernalillo County, New Mexico)
Parker through truss bridge over the Rio Puerco on the frontage road (formerly US 66) at exit 140 on IH-40
Rising Hail Colony (Charles Mix County, South Dakota)
Rison Cities Service Station (Cleveland County, Arkansas)
Ritz Theater (Dougherty County, Georgia)
Ritz Theater (Stephens County, Georgia)
Ritz Theater (Guilford County, North Carolina)
Ritz Theater (Newberry County, South Carolina)
Ritz Theater (San Diego County, California)
Ritz Theater (Columbus County, North Carolina)
Ritz Theater (Butler County, Alabama)
Ritz Theater (Clinton County, Missouri)
Ritz Theater (Adams County, Washington)
River Oaks Theater (Harris County, Texas)
River Terrace Apartments (Wayne County, Michigan)
Riverdale School (Knox County, Tennessee)
Riverside Church (New York County, New York)
Riviera Courts--Motel (Ottawa County, Oklahoma)
Riviera Hotel (Garland County, Arkansas)
Riviera Theater (Charleston County, South Carolina)
Riviera Theater (Dakota County, Minnesota)
Riviera, The (Walworth County, Wisconsin)
RMS QUEEN MARY (Los Angeles County, California)
Road Island Diner (Summit County, Utah)
Fully restored diner of the Jerry O'Mahony Co. #1107
Roaring River State Park Bath House (Barry County, Missouri)
Roaring River State Park Dam/Spillway (Barry County, Missouri)
Roaring River State Park Hotel (Barry County, Missouri)
Robert and Mabel Loomis House (Hood River County, Oregon)
Robert Bruce Barbour House (Orange County, Florida)
Robert E. Lee School (Bryan County, Oklahoma)
Robert Frost Farm (Bennington County, Vermont)
Robert Fulton School (Philadelphia County, Pennsylvania)
Robert G. Turner House (Greenville County, South Carolina)
Robert H. Goddard House (Chaves County, New Mexico)
Robert Hosmer Morse House (Lake County, Illinois)
Robert Lee Williams Public Library (Bryan County, Oklahoma)
Robert Nordhaus House (Bernalillo County, New Mexico)
Robert R. Coker House (Darlington County, South Carolina)
Robert Smith Mortuary (Vanderburgh County, Indiana)
Roberta School Campus (Bryan County, Oklahoma)
Roberts Pavilion (Horry County, South Carolina)
Roberts Vaux Junior High School (Philadelphia County, Pennsylvania)
Robeson County Agricultural Building (Robeson County, North Carolina)
Robeson, Paul, Home (New York County, New York)
Robinson Hall (Kidder County, North Dakota)
Robinson Hall--Louisiana Tech University (Lincoln Parish, Louisiana)
Robinson High School Auditorium--Gymnasium (Crawford County, Illinois)
Robinwood Aparments (Spokane County, Washington)
Rochambeau Branch--Providence Public Library (Providence County, Rhode Island)
Rochester Public Library (Olmsted County, Minnesota)
Rock Cafe (Lincoln County, Oklahoma)
Rock City Gardens (Walker County, Georgia)
Rock County Courthouse (Rock County, Nebraska)
Rock Creek Bridge (Pittsburg County, Oklahoma)
Rock Island Dam (Chelan County, Washington)
Hydro-electric concrete dam built 1930 - '33
Rockaway Courthouse (Queens County, New York)
Rockdale County Courthouse (Rockdale County, Georgia)
Rockefeller Center (New York County, New York)
Rockwood Lodge Barn and Pigsty (Brown County, Wisconsin)
Rockwood Post Office (Roane County, Tennessee)
Rocky Ford Post Office (Otero County, Colorado)
Rocky Neck Pavilion (New London County, Connecticut)
Rocky Point CCC Properties (Benewah County, Idaho)
Rodgers Theater (Tehama County, California)
Roesch Building (Union County, Oregon)
Roff Armory (Pontotoc County, Oklahoma)
Rogers Administration Building (San Miguel County, New Mexico)
Rogers Dry Lake (Kern County, California)
Rogers Theater (Cleveland County, North Carolina)
Rogers-Post Site (North Slope Borough, Alaska)
Rogue River Bridge No. 01172 (Curry County, Oregon)
Concrete arch bridge over Rogue River on US 101 in Gold Beach
Rogue Theatre (Josephine County, Oregon)
Rolla Ranger Station Historic District (Phelps County, Missouri)
Roosevelt County Courthouse (Roosevelt County, New Mexico)
Roosevelt Elementary School (Kay County, Oklahoma)
Roosevelt Hall (Grant County, Minnesota)
Roosevelt Hall (Spokane County, Washington)
Roosevelt Hospital (Middlesex County, New Jersey)
Roosevelt Park (Bernalillo County, New Mexico)
Roosevelt School (Polk County, Florida)
Roosevelt School (Aroostook County, Maine)
Roosevelt School (Sandoval County, New Mexico)
Roosevelt State Park (Scott County, Mississippi)
Root--Banks House (Jackson County, Oregon)
Roscoe Community Hall (Edmunds County, South Dakota)
Roscoe State Aid Bridge (Keith County, Nebraska)
Rosedale Apartments (Providence County, Rhode Island)
Roseland Theater (Accomack County, Virginia)
Rosenburg's Department Store (Sonoma County, California)
Rosenwald School (Pike County, Arkansas)
Roslyn Auditorium (Day County, South Dakota)
Roslyn Savings Bank Building (Nassau County, New York)
Round House (Barnstable County, Massachusetts)
Roundtop Filling Station (Pulaski County, Arkansas)
Route 66, TX 207 to I-40 (Carson County, Texas)
Roxie Theater (Los Angeles County, California)
Roxy Theater (Carroll County, Arkansas)
Roxy Theater (Lewis County, Washington)
Roxy Theater (Faribault County, Minnesota)
Roxy Theater (King County, Washington)
Roxy Theater (Valley County, Idaho)
Roxy Theatre (Cavalier County, North Dakota)
Roy and Leola Gangware House (Multnomah County, Oregon)
Roy T. Herman's Garage and Service Station (McKinley County, New Mexico)
Royal Theater (Troup County, Georgia)
Royston Nave Memorial (Victoria County, Texas)
Rt 66 38 Span Pony Bridge (Caddo County, Oklahoma)
Rudolf Ericson House (Iron County, Michigan)
Ruffin Theater (Tipton County, Tennessee)
Ruge Hall (Leon County, Florida)
Ruleville Depot (Sunflower County, Mississippi)
Rundel Memorial Library (Monroe County, New York)
Rush County Line Bridge (Rush County, Kansas)
Three-span stone arch bridge over an unnamed creek, 11.0 mi. north and 0.7 mi. east of Otis
Russell and Pearl Soderling House (Boundary County, Idaho)
Russell Lodge No. 284 (Russell County, Kentucky)
Russell School (Flathead County, Montana)
Russell Theatre (Mason County, Kentucky)
Russellville Armory (Logan County, Kentucky)
Russellville Public Library (Pope County, Arkansas)
Russian Village Historic District (New Haven County, Connecticut)
Rustler Park Fire Guard Station (Cochise County, Arizona)
Ruston High School (Lincoln Parish, Louisiana)
Rutherford Health Department (Rutherford County, Tennessee)
Ryan, William J., Estate (Suffolk County, New York)
RyeMabee (Marion County, Tennessee)
S & S Sandwich Shop (Miami-Dade County, Florida)
S. B. Elliott State Park Day Use District (Clearfield County, Pennsylvania)
S. B. Elliott State Park Family Cabin District (Clearfield County, Pennsylvania)
S. H. Kress and Company Building (Jefferson County, Alabama)