U.S. History
- Spelling Bee
- spoils system
- Square Deal
- Squatter settlements
- Staggers Rail Act of 1980
- Stamp Act
- Standard Oil Company
- states rights
- Steamboats
- Strikes
- Strontium 90
- Students for a Democratic Society
- Suburbanization
- Sugar industry
- Superstores
- Survey services (Geodesy)
- Susquehanna Company
- Tallmadge Amendment of 1819 (Draft)
- Tammany
- Tax rates