- Dance Companies, Montoursville
- Data Communications Service, Equipment, Supplies & Sales, Montoursville
- Data Processing Services, Montoursville
- Day Spas, Montoursville
- Delicatessen Restaurants, Montoursville
- Denomination, Non-Denominational, Etcetera, Montoursville
- Dental Service Organizations, Montoursville
- Dentists, Montoursville
- Department Stores, Montoursville
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