- Neighborhoods 66
- Art & Architecture 49
- Military History 35
- Civil War 34
- Black History 32
- Politics & Government 30
- Business & Industry 26
- Transportation 24
- Women's History 17
- Civil Rights 13
- Entertainment 13
- Foodways 10
- Geography & Environment 10
- Religion 9
- Education 8
- Sports & Leisure 8
- Native American History 6
- Science & Technology 6
- Domestic Life 5
- Agriculture 4
- Cultural Heritage 4
- Colonial 2
- LGBTQ+History 2
- Holiday & Traditions 1