Flag of Massachusetts
| Use | Civil and state flag |
|---|---|
| Proportion | 3:5 |
| Adopted | March 18, 1908 (initial version) 1971 (current design) |
| Design | A state coat of arms on a white field. |
| Flag of the governor of Massachusetts | |
| Design | State flag in the form of a pennant. |
| Massachusetts ensign | |
| Use | Naval ensign |
| Adopted | 1971 |
| Design | A green tree on a white field. |
The flag of the Commonwealth of Massachusetts was adopted on March 18, 1908, and has only been changed once in 1971 with the removal of the reverse side. The flag features the coat of arms of the Commonwealth on a white field. The state currently has three official flags: a state flag, a governor's flag, and a "naval and maritime flag" (despite it no longer having its own naval militia).
With Florida, it is one of only two state flags to prominently feature a Native American. The flag of Minnesota also featured a Native American until 2024.