| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| UPALA | airport | Costa Rica | 10.89 | -85.02 | 184 | 0 | |
| UPL (UPALA) | airport | Costa Rica | 10.89 | -85.02 | 184 | 0 | |
| Uatsi | city | Limon | Costa Rica | 9.63 | -82.87 | 95 | 1151 |
| Ujarras | city | Guanacaste | Costa Rica | 10.22 | -85.03 | 124 | 3278 |
| Ujarras | city | Puntarenas | Costa Rica | 9.25 | -83.30 | 2037 | 2980 |
| Ujarrás | city | Cartago | Costa Rica | 9.83 | -83.83 | 3349 | 36324 |
| Ujarrás | city | Alajuela | Costa Rica | 10.28 | -84.18 | 2572 | 19737 |
| Ujarráz | city | Puntarenas | Costa Rica | 9.25 | -83.30 | 2037 | 2980 |
| Ujarráz | city | Guanacaste | Costa Rica | 10.22 | -85.03 | 124 | 3278 |
| Union | city | Puntarenas | Costa Rica | 10.16 | -84.72 | 2509 | 6162 |
| Union | city | Puntarenas | Costa Rica | 8.60 | -83.05 | 75 | 3367 |
| Union | city | Guanacaste | Costa Rica | 10.72 | -85.19 | 2509 | 1639 |
| Universidad | city | San Jose | Costa Rica | 9.94 | -84.05 | 4189 | 598056 |
| University City | city | San Jose | Costa Rica | 9.94 | -84.05 | 4189 | 598056 |
| Unión | city | Guanacaste | Costa Rica | 10.50 | -84.85 | 1833 | 3817 |
| Unión Vieja | city | Guanacaste | Costa Rica | 11.15 | -85.47 | 265 | 1778 |
| Unión de Coto | city | Puntarenas | Costa Rica | 8.60 | -83.05 | 75 | 3367 |
| Upala | city | Alajuela | Costa Rica | 10.90 | -85.01 | 150 | 1490 |
| Urasca | city | Cartago | Costa Rica | 9.84 | -83.79 | 4189 | 18575 |
| Urbs Sancti Iosephi in Costarica | city | San Jose | Costa Rica | 9.93 | -84.08 | 3763 | 628509 |
| Urena | city | San Jose | Costa Rica | 9.37 | -83.70 | 2509 | 15022 |
| Uriche | city | Heredia | Costa Rica | 10.00 | -84.10 | 4189 | 298997 |
| Urinama | city | Limon | Costa Rica | 9.55 | -83.37 | 4274 | 1068 |
| Uruca | city | San Jose | Costa Rica | 9.76 | -84.13 | 3589 | 22310 |
| Uruca | city | San Jose | Costa Rica | 9.95 | -84.10 | 3602 | 621928 |
| Uruchica | city | Limon | Costa Rica | 9.53 | -83.07 | 1669 | 1043 |
| Uruchico | city | Limon | Costa Rica | 9.53 | -83.07 | 1669 | 1043 |
| Utasca | city | Cartago | Costa Rica | 9.84 | -83.79 | 4189 | 18575 |
| Uvita | city | Puntarenas | Costa Rica | 9.15 | -83.76 | 0 | 1255 |
| Uvita | city | Guanacaste | Costa Rica | 10.24 | -85.17 | 223 | 3736 |
| Uvita | city | Heredia | Costa Rica | 10.05 | -84.09 | 5232 | 91445 |