- 2 Smithson, Elizabeth, 1811?-1860
- 5 Smithsonian Institution
- 1 Smithville, New Jersey
- 13 Smoke
- 1 Smokeless tobacco
- 1 Smokers
- 68 Smokestacks
- 9 Smoking
- 1 Smollett, T. (Tobias), 1721-1771
- 1 Smuggling
- 1 Smyth, James Brewery
- 16 Snails
- 32 Snakes
- 1 Snavely, C. J.
- 1 Snellenburg & Co.
- 1 Snipes
- 1 Snodgrass, Murray & Co. Cloths. (Firm)
- 65 Snow
- 2 Snow Hill Cloister
- 2 Snow removal
- 1 Snow White
- 1 Snow, William Parker, 1817-1895
- 1 Snowden, Archibald Loudon, 1837-1912
- 4 Snowplows
- 2 Snowstorms
- 4 Snuff
- 1 snuff
- 27 Snyder Avenue
- 2 Snyder, Charles A., 1867-19??
- 3 Snyder, Hannah
- 1 Snyder, Harris, Bassett & Co. Wholesale Clothing (Firm)
- 1 Snyder, Joseph-slaughterhouse
- 1 Snyder, M.K. Blinds
- 2 Snyder's Spade Factory
- 1 Snyder's Spade Mill
- 26 Soap
- 2 Soap balls (Sculpture)
- 2 Soap bubbles (Sculpture)
- 2 Social aspects
- 1 Social conflict
