- Tanning Salons, Sidney
- Tattooing, Sidney
- Tax Return Preparation, Sidney
- Taxi Cab Service, Sidney
- Taxi Service, Sidney
- Technological Research & Development, Sidney
- Telecommunications, Sidney
- Telephone Communication Service & Phone Companies, Sidney - Local & Long Distance Telephone Service
- Telephone Equipment & Phone Systems, Sidney - Sales, Service & Repair
- Telephone Equipment & Systems - Repair & Service, Sidney - Telecommunication Services
- Testing Laboratories, Sidney - Lab Tests
- Thrift Stores, Resale & Consignment Shops, Sidney
- Tires - Wholesale & Retail, Sidney
- Title & Surety Insurance, Sidney
- Title Companies, Sidney - Title Search, Service & Abstract Company
- Tools & Hardware Supplies, Sidney
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- Tourist Attractions, Sidney
- Towing Service, Sidney
- Traffic & Transportation Engineer, Sidney
- Transportation, Sidney
- Transportation, Sidney
- Transportation Facilities & Services, Sidney
- Transportation Rental & Leasing, Sidney
- Transportation Repair & Maintenance, Sidney
- Travel & Tourism, Sidney
- Travel Arrangement & Services, Sidney
- Trenching Contractors, Sidney - Trencher - Excavation Contractors
- Trinity Church, Sidney
- Truck Repair & Service, Sidney
- Trust And Will Attorneys & Lawyers, Sidney
- Trust And Will Lawyers & Attorneys, Sidney
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