- Ear & Body Piercing, Ottumwa
- Education, Ottumwa
- Education & Information Services, Ottumwa
- Education Associations & Organizations, Ottumwa
- Education Services, Ottumwa
- Electric Motor Repair & Service, Ottumwa
- Electric Motors & Generators , Ottumwa
- Electrical Control Systems & Materials, Ottumwa
- Electrical Supplies, Parts & Equipment, Ottumwa - Wholesale & Manufacturers
- Electricians, Ottumwa - Electrical Contractors
- Electronics Repair & Maintenance , Ottumwa
- Electronics Stores, Ottumwa
- Elementary Schools, Ottumwa
- Elevator & Escalators Sales, Repair & Service, Ottumwa
- Emergency Services, Ottumwa
- Emergency Victim Services, Ottumwa
- Employee Counseling Services, Ottumwa
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- Employment & Recruiting Services, Ottumwa
- Employment Agencies, Ottumwa - Staffing Agencies
- Employment And Labor Relations Attorneys & Lawyers, Ottumwa
- Employment Assistance, Ottumwa
- Employment Information, Ottumwa
- Employment Opportunities, Ottumwa
- Employment Services, Ottumwa
- Engine Rebuild, Repair & Exchange, Ottumwa
- Engineer & Architect Services, Ottumwa - Engineering & Architecture Service
- ENT, Ottumwa - Ears Nose & Throat Doctors, Physicians & Surgeons
- Entertainment & Recreation, Ottumwa
- Environmental Groups, Ottumwa
- Episcopal Churches, Ottumwa
- Ethnic Churches, Ottumwa
- European Cuisine, Ottumwa
- Excavation Contractors, Ottumwa - Excavating - Excavator Companies
- Exterior Design & Decorator Services, Ottumwa
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