Category:Built in Massachusetts in 1815
- States of the United States
- Alabama
- Connecticut
- Indiana
- Kentucky
- Louisiana
- Maryland
- Massachusetts
- Michigan
- New Hampshire
- New York
- North Carolina
- Ohio
- Pennsylvania
- Rhode Island
- South Carolina
- Virginia
- West Virginia
- District of Columbia
- Washington, D.C.
- Insular areas
- Puerto Rico
Subcategories
This category has the following 2 subcategories, out of 2 total.