Flag of Costa Rica
| Use | National flag and civil ensign |
|---|---|
| Proportion | 3:5: 2 |
| Adopted | 29 September 1848 |
| Design | Five horizontal bands of blue, white, and red (double width). |
| Designed by | Pacífica Fernández |
| Use | State and war flag, state and naval ensign |
| Proportion | 3:5 |
| Adopted | 27 November 1906 (modified in 1998) |
| Design | Five horizontal bands of blue, white, and red (double width), with the coat of arms offcenter to the left. |
| Designed by | Pacífica Fernández |
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The national flag of Costa Rica (Spanish: Bandera de Costa Rica) is based on a design created in 1848 and consists of two blue stripes, two white stripes, and a central red stripe which is twice as wide as each of the other four. The civil flag omits the coat of arms seen on the state flag, since the state variant is only permitted to be used by the government.
The flag was officially adopted on 29 September 1848, with the only modifications since then being to the placement and design of the entrenched coat of arms on the state flag. The state variant of the flag has been updated to reflect concurrent modifications to the national coat of arms in 1906, 1964, and 1998.