| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Da Glória | city | Piaui | Brazil | -5.19 | -42.75 | 344 | 148244 |
| Da Paz | city | Piaui | Brazil | -5.12 | -42.78 | 183 | 184015 |
| Davi Caldas | city | Piaui | Brazil | -4.75 | -42.93 | 141 | 1041 |
| De Tras da Serra | city | Piaui | Brazil | -7.78 | -41.67 | 879 | 4145 |
| Deliciosa | city | Piaui | Brazil | -5.50 | -41.32 | 974 | 15457 |
| Demerval Lobao | city | Piaui | Brazil | -5.36 | -42.68 | 413 | 12165 |
| Demervallobão | city | Piaui | Brazil | -5.36 | -42.68 | 413 | 12165 |
| Dermeval Lobao | city | Piaui | Brazil | -5.36 | -42.68 | 413 | 12165 |
| Descanso | city | Piaui | Brazil | -6.27 | -42.80 | 331 | 6953 |
| Descida da Boiada | city | Piaui | Brazil | -7.63 | -41.87 | 830 | 2148 |
| Descoberta | city | Piaui | Brazil | -5.90 | -42.12 | 830 | 1041 |
| Desejado | city | Piaui | Brazil | -9.74 | -43.98 | 1938 | 298 |
| Deserto | city | Piaui | Brazil | -3.66 | -41.59 | 406 | 1232 |
| Deserto | city | Piaui | Brazil | -5.53 | -41.27 | 1249 | 5800 |
| Designio | city | Piaui | Brazil | -4.33 | -42.97 | 114 | 7499 |
| Deus Proverá | city | Piaui | Brazil | -5.10 | -42.73 | 295 | 205404 |
| Diamantina | city | Piaui | Brazil | -6.18 | -41.95 | 830 | 596 |
| Dico Leopoldina | city | Piaui | Brazil | -5.85 | -41.35 | 1003 | 0 |
| Direcão | city | Piaui | Brazil | -6.05 | -41.85 | 1026 | 596 |
| Divina - Projeto Mandacaru | city | Piaui | Brazil | -5.09 | -42.78 | 324 | 196216 |
| Divisão 1 | city | Piaui | Brazil | -6.15 | -41.93 | 908 | 596 |
| Divisão 2 | city | Piaui | Brazil | -6.77 | -40.98 | 2060 | 899 |
| Do Aviao | city | Piaui | Brazil | -5.00 | -42.78 | 328 | 157393 |
| Do Buraco | city | Piaui | Brazil | -5.06 | -42.75 | 403 | 205404 |
| Do Ceu | city | Piaui | Brazil | -5.09 | -42.78 | 324 | 198432 |
| Dois Amigos | city | Piaui | Brazil | -3.36 | -42.11 | 32 | 1007 |
| Dois Irmaos | city | Piaui | Brazil | -5.45 | -42.28 | 830 | 1036 |
| Domicilio | city | Piaui | Brazil | -5.10 | -42.63 | 830 | 41223 |
| Domingos Mourão | city | Piaui | Brazil | -4.25 | -41.27 | 830 | 596 |
| Dominguinho | city | Piaui | Brazil | -7.88 | -41.87 | 1013 | 8088 |
| Dourado | city | Piaui | Brazil | -6.02 | -41.83 | 1003 | 419 |
| Doutor Sampaio | city | Piaui | Brazil | -6.87 | -42.87 | 1187 | 298 |
| Duas Barras | city | Piaui | Brazil | -9.57 | -44.60 | 984 | 355 |
| Duas Barras | city | Piaui | Brazil | -8.95 | -42.10 | 987 | 298 |
| Duas Lagoas 1 | city | Piaui | Brazil | -7.23 | -43.42 | 830 | 2 |
| Duas Lagoas 2 | city | Piaui | Brazil | -7.32 | -43.12 | 830 | 25 |
| Duros | city | Piaui | Brazil | -6.12 | -40.97 | 1929 | 0 |