UpAlphabetical listing of Places in Guanacaste
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Bagaces | city | Guanacaste | Costa Rica | 10.53 | -85.25 | 232 | 1639 |
| Bajo Paires | city | Guanacaste | Costa Rica | 10.56 | -85.03 | 1873 | 5614 |
| Ballena | city | Guanacaste | Costa Rica | 10.36 | -85.44 | 19 | 4805 |
| Barbudal | city | Guanacaste | Costa Rica | 10.20 | -85.10 | 272 | 3003 |
| Barco Quebrado | city | Guanacaste | Costa Rica | 10.31 | -85.82 | 272 | 3631 |
| Barra Honda | city | Guanacaste | Costa Rica | 10.15 | -85.35 | 216 | 4917 |
| Bebedero | city | Guanacaste | Costa Rica | 10.37 | -85.19 | 55 | 3620 |
| Bebidero | city | Guanacaste | Costa Rica | 10.37 | -85.19 | 55 | 3620 |
| Bejuco | city | Guanacaste | Costa Rica | 9.85 | -85.33 | 9 | 2550 |
| Belen | city | Guanacaste | Costa Rica | 10.41 | -85.59 | 121 | 6508 |
| Bella Vista | city | Guanacaste | Costa Rica | 9.93 | -85.27 | 1909 | 4563 |
| Bellavista | city | Guanacaste | Costa Rica | 9.95 | -85.28 | 2618 | 4242 |
| Bellavista | city | Guanacaste | Costa Rica | 11.03 | -85.63 | 830 | 1874 |
| Bernabela | city | Guanacaste | Costa Rica | 10.33 | -85.56 | 124 | 4787 |
| Berrugate | city | Guanacaste | Costa Rica | 10.05 | -85.18 | 19 | 2684 |
| Boca Nosara | city | Guanacaste | Costa Rica | 9.98 | -85.65 | 3 | 4387 |
| Boca de Nosara | city | Guanacaste | Costa Rica | 9.98 | -85.65 | 3 | 4387 |
| Boca del Nosara | city | Guanacaste | Costa Rica | 9.98 | -85.65 | 3 | 4387 |
| Bocas de Nosara | city | Guanacaste | Costa Rica | 9.98 | -85.65 | 3 | 4387 |
| Bocas del Nasara | city | Guanacaste | Costa Rica | 9.98 | -85.65 | 3 | 4387 |
| Bolgón | city | Guanacaste | Costa Rica | 10.36 | -85.45 | 16 | 5137 |
| Bolson | city | Guanacaste | Costa Rica | 10.36 | -85.45 | 16 | 5137 |
| Boquerones | city | Guanacaste | Costa Rica | 10.52 | -85.58 | 95 | 4026 |
| Boquete | city | Guanacaste | Costa Rica | 10.12 | -85.35 | 265 | 4902 |
| Boston | city | Guanacaste | Costa Rica | 10.30 | -84.91 | 1669 | 3567 |
| Botija | city | Guanacaste | Costa Rica | 10.14 | -85.29 | 108 | 4629 |
| Brasilito | city | Guanacaste | Costa Rica | 10.99 | -85.69 | 98 | 1273 |
| Brasilito | city | Guanacaste | Costa Rica | 10.40 | -85.80 | 124 | 3040 |
| Brisas | city | Guanacaste | Costa Rica | 11.18 | -85.57 | 856 | 2022 |
| Buena Vista | city | Guanacaste | Costa Rica | 9.91 | -85.54 | 68 | 4503 |
| Buena Vista | city | Guanacaste | Costa Rica | 10.83 | -85.47 | 1040 | 1043 |
| Buenos Aires | city | Guanacaste | Costa Rica | 9.91 | -85.48 | 830 | 4683 |
| Buenos Aires | city | Guanacaste | Costa Rica | 10.56 | -85.59 | 101 | 3877 |
| Burio | city | Guanacaste | Costa Rica | 11.02 | -85.63 | 830 | 1897 |
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