- Sandwich Shop Restaurants, Anamosa
- Scales Retail, Anamosa
- School - Catholic, Anamosa
- School - Christian, Anamosa
- Scientific & Research Professionals, Anamosa
- Scrap & Waste Materials, Anamosa
- Security Brokers & Dealers, Anamosa
- Seeds & Bulbs Wholesale & Growers, Anamosa
- Senior Citizens Service & Health Organizations, Anamosa
- Sewer & Drain Cleaning & Repair, Anamosa - Drain Cleaner & Installation Services
- Shopping & Shopping Services, Anamosa
- Siding Contractors, Anamosa - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, Anamosa
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- Snowmobile Repair, Parts, Sales & Service, Anamosa
- Social Services & Welfare, Anamosa
- Societies & Foundation Associations, Anamosa
- Specialty Animal Services, Anamosa
- Specialty Stores, Anamosa
- Sporting Goods Stores, Anamosa
- State Government, Anamosa
- Stocks & Bond Brokers, Anamosa
- Store Fixtures & Display Equipment, Anamosa
- Submarine Sandwich Restaurants, Anamosa
- Supper Club Restaurants, Anamosa
- Surveyor Services, Anamosa - Surveying Service
- Swimming Pools, Anamosa
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