| Florida Avenue NW Florida Avenue NE | |
 The 1791 L'Enfant Plan, under which Boundary Street (now Florida Avenue) marked the northern limits of Washington, D.C. from Rock Creek in the west to 15th Street in the northeast | |
| Former name(s) | Boundary Street |
|---|---|
| Maintained by | DDOT |
| Location | Washington, D.C., U.S. |
| Coordinates | 38°54′59.6″N 77°1′21.2″W / 38.916556°N 77.022556°W |
| West end | Massachusetts Avenue |
| Major junctions | Connecticut Avenue U / 18th Streets NW 16th Street NW  US 29 (Georgia Avenue to the north, 7th Street NW to the south) US 1 (Rhode Island Avenue NW)North Capitol Street  US 50 (New York Avenue NE) |
| East end | Starburst Plaza |
| Construction | |
| Commissioned | 1791 |
| Completion | 1818 |
 | |
Florida Avenue is a major street in Washington, D.C. It was originally named Boundary Street, because it formed the northern boundary of the Federal City under the 1791 L'Enfant Plan. With the growth of the city beyond its original borders, Boundary Street was renamed Florida Avenue in 1890.