225 cities and towns
| Abbreviation | 20 |
| State Population | 3,193,333 |
| # | City | Population | Median Income | Home Value | Median Rent | Median Age |
|---|---|---|---|---|---|---|
| 51 | Capitão de Campos | 11,100 | N/A | N/A | N/A | 34.3 |
| 52 | Avelino Lopes | 10,866 | N/A | N/A | N/A | 34.3 |
| 53 | Itainópolis | 10,790 | N/A | N/A | N/A | 34.3 |
| 54 | Monte Alegre do Piauí | 10,660 | N/A | N/A | N/A | 34.3 |
| 55 | Matias Olímpio | 10,641 | N/A | N/A | N/A | 34.3 |
| 56 | Cristino Castro | 10,503 | N/A | N/A | N/A | 34.3 |
| 57 | Itaueira | 10,323 | N/A | N/A | N/A | 34.3 |
| 58 | Caracol | 10,318 | N/A | N/A | N/A | 34.3 |
| 59 | Nazária | 10,262 | N/A | N/A | N/A | 34.3 |
| 60 | Fronteiras | 10,259 | N/A | N/A | N/A | 34.3 |
| 61 | Monsenhor Gil | 10,255 | N/A | N/A | N/A | 34.3 |
| 62 | Cabeceiras do Piauí | 10,212 | N/A | N/A | N/A | 34.3 |
| 63 | Parnaguá | 10,103 | N/A | N/A | N/A | 34.3 |
| 64 | Beneditinos | 9,929 | N/A | N/A | N/A | 34.3 |
| 65 | Sigefredo Pacheco | 9,460 | N/A | N/A | N/A | 34.3 |
| 66 | Ipiranga do Piauí | 9,420 | N/A | N/A | N/A | 34.3 |
| 67 | Anísio de Abreu | 9,407 | N/A | N/A | N/A | 34.3 |
| 68 | Ilha Grande | 9,274 | N/A | N/A | N/A | 34.3 |
| 69 | Dom Inocêncio | 9,159 | N/A | N/A | N/A | 34.3 |
| 70 | Queimada Nova | 8,738 | N/A | N/A | N/A | 34.3 |
| 71 | Marcolândia | 8,533 | N/A | N/A | N/A | 34.3 |
| 72 | Nossa Senhora dos Remédios | 8,525 | N/A | N/A | N/A | 34.3 |
| 73 | Redenção do Gurguéia | 8,394 | N/A | N/A | N/A | 34.3 |
| 74 | Lagoa Alegre | 8,256 | N/A | N/A | N/A | 34.3 |
| 75 | Francisco Santos | 8,237 | N/A | N/A | N/A | 34.3 |
| 76 | São João do Arraial | 8,186 | N/A | N/A | N/A | 34.3 |
| 77 | Madeiro | 8,032 | N/A | N/A | N/A | 34.3 |
| 78 | Cajueiro da Praia | 7,957 | N/A | N/A | N/A | 34.3 |
| 79 | Isaías Coelho | 7,774 | N/A | N/A | N/A | 34.3 |
| 80 | Monsenhor Hipólito | 7,577 | N/A | N/A | N/A | 34.3 |
| 81 | Assunção do Piauí | 7,452 | N/A | N/A | N/A | 34.3 |
| 82 | Buriti dos Montes | 7,434 | N/A | N/A | N/A | 34.3 |
| 83 | Campo Largo do Piauí | 7,419 | N/A | N/A | N/A | 34.3 |
| 84 | Cristalândia do Piauí | 7,356 | N/A | N/A | N/A | 34.3 |
| 85 | Dirceu Arcoverde | 7,054 | N/A | N/A | N/A | 34.3 |
| 86 | Boa Hora | 6,902 | N/A | N/A | N/A | 34.3 |
| 87 | Angical do Piauí | 6,827 | N/A | N/A | N/A | 34.3 |
| 88 | Alagoinha do Piauí | 6,819 | N/A | N/A | N/A | 34.3 |
| 89 | Nazaré do Piauí | 6,665 | N/A | N/A | N/A | 34.3 |
| 90 | Barro Duro | 6,640 | N/A | N/A | N/A | 34.3 |
| 91 | São José do Piauí | 6,597 | N/A | N/A | N/A | 34.3 |
| 92 | Boqueirão do Piauí | 6,545 | N/A | N/A | N/A | 34.3 |
| 93 | Milton Brandão | 6,542 | N/A | N/A | N/A | 34.3 |
| 94 | Acauã | 6,420 | N/A | N/A | N/A | 34.3 |
| 95 | Cocal dos Alves | 6,386 | N/A | N/A | N/A | 34.3 |
| 96 | Padre Marcos | 6,382 | N/A | N/A | N/A | 34.3 |
| 97 | Lagoa de São Francisco | 6,331 | N/A | N/A | N/A | 34.3 |
| 98 | Dom Expedito Lopes | 6,320 | N/A | N/A | N/A | 34.3 |
| 99 | Sussuapara | 6,220 | N/A | N/A | N/A | 34.3 |
| 100 | Betânia do Piauí | 6,220 | N/A | N/A | N/A | 34.3 |