- Salvation Army, Petersburg
- Sand Gravel & Aggregate, Petersburg
- Satellite TV Service, Petersburg
- Savings Banks, Petersburg
- Senior Citizens Service & Health Organizations, Petersburg
- Septic Tanks & Systems, Petersburg - Wholesale, Dealers & Suppliers
- Shoe Stores, Petersburg - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Petersburg
- Sightseeing Tours, Petersburg
- Skating Supplies, Petersburg - Ice, Inline, Speed, Figure & Roller Skates
- Snow Removal Services, Petersburg - Snow Plow Service
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- Social Services & Welfare, Petersburg
- Societies & Foundation Associations, Petersburg
- Special Needs Transportation, Petersburg
- Specialty Stores, Petersburg
- Sporting Goods Stores, Petersburg
- Stairs, Balcony, Terrace & Steeple Contractors, Petersburg
- State Government, Petersburg
- Surveyor Services, Petersburg - Surveying Service
- Surveyors, Petersburg
- Swimming, Petersburg
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