History of Caribou to Incorporation:
Located in Aroostook County
Consists of T13R2 and T14R2 plus Eaton Grant, which makes 2.6 square miles larger than a double township, each township being 6 square miles, for a total of 14.6 square miles.
| 1848 – | T13R2 incorporated as Letter H Township |
| 1859 – | Letter H incorporated as Town of Lyndon |
| 1869 – | T14R2 a/k/a Letter I Plantation (or Forestville) plus Eaton Grant were annexed to Town of Lyndon |
| 1877 – | Town of Lyndon changed to Town of Caribou |
| 1968 – | Town of Caribou incorporated as City of Caribou |
| ALSO: | |
| 1986 – | Site of launch of first solo trans-Atlantic balloon flightJoe W. Kittinger, balloonist (September 16, 1986) |