Seia's 2026 population is now estimated at 21,233. In 2021, the population of Seia was 21,709. Seia experienced a decrease of -88 residents over the past year, marking an annual decline of -0.41%. These population values and projections come from Portugal INE API indicator 0012917 resident population municipal total and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Lisbon | 596,952 | 1.83% |
| Sintra | 410,420 | 1.17% |
| Vila Nova de Gaia | 317,859 | 0.78% |
| Porto | 264,493 | 2.31% |
| Cascais | 228,079 | 1.28% |
| Loures | 214,856 | 1.18% |
| Braga | 209,328 | 1.42% |
| Amadora | 187,541 | 1.62% |
| Almada | 187,519 | 1.05% |
| Matosinhos | 185,501 | 1.22% |
| Seixal | 183,000 | 1.71% |
| Oeiras | 181,965 | 1.15% |
| Gondomar | 171,928 | 0.75% |
| Odivelas | 161,278 | 1.59% |
| Guimaraes | 156,587 | 0.02% |
| Coimbra | 150,409 | 1.19% |
| Maia | 149,556 | 1.68% |
| Santa Maria da Feira | 142,787 | 0.79% |
| Vila Franca de Xira | 142,764 | 0.73% |
| Leiria | 140,182 | 1.52% |
| Vila Nova de Famalicao | 138,490 | 0.65% |
| Setubal | 125,129 | 0.32% |
| Barcelos | 117,213 | 0.11% |
| Funchal | 109,293 | 0.54% |
| Viseu | 105,848 | 1.13% |
| Valongo | 104,838 | 1.65% |
| Mafra | 93,466 | 1.21% |
| Torres Vedras | 92,806 | 1.82% |
| Aveiro | 92,155 | 2.24% |
| Vila do Conde | 88,510 | 1.53% |
| Viana do Castelo | 87,668 | 0.4% |
| Paredes | 87,656 | 0.63% |
| Barreiro | 82,822 | 1.04% |
| Loule | 78,066 | 1.51% |
| Palmela | 77,376 | 1.94% |
| Moita | 72,737 | 1.65% |
| Faro | 71,996 | 1.16% |
| Penafiel | 70,831 | 0.29% |
| Povoa de Varzim | 70,817 | 1.71% |
| Ponta Delgada | 69,841 | 0.58% |
| Oliveira de Azemeis | 68,071 | 0.44% |
| Santo Tirso | 67,767 | 0.04% |
| Portimao | 67,311 | 2.18% |
| Montijo | 63,193 | 2.11% |
| Santarem | 62,973 | 1.06% |
| Figueira da Foz | 62,802 | 1.14% |
| Alcobaca | 59,572 | 1.37% |
| Ovar | 59,153 | 1.27% |
| Sesimbra | 58,764 | 1.91% |
| Caldas da Rainha | 57,543 | 2.1% |
| Pacos de Ferreira | 56,289 | 0.19% |
| Felgueiras | 54,969 | -0.23% |
| Castelo Branco | 53,955 | 0.57% |
| Evora | 53,954 | 0.04% |
| Pombal | 53,403 | 0.79% |
| Amarante | 52,267 | 0.09% |
| Alenquer | 52,059 | 2.58% |
| Albufeira | 51,667 | 2.89% |
| Vila Real | 50,365 | 0.32% |
| Vila Verde | 49,917 | 1.24% |
| Marco de Canaveses | 49,495 | -0.01% |
| Lousada | 49,354 | 0.72% |
| Agueda | 48,598 | 0.91% |
| Fafe | 48,485 | 0.07% |
| Ourem | 48,221 | 1.3% |
| Covilha | 46,799 | 0.21% |
| Santa Cruz | 46,100 | 1.42% |
| Olhao | 46,003 | 0.61% |
| Ilhavo | 45,360 | 2.46% |
| Marinha Grande | 43,288 | 1.8% |
| Silves | 41,720 | 1.74% |
| Trofa | 41,176 | 1.09% |
| Ponte de Lima | 41,034 | -0.04% |
| Guarda | 40,015 | -0.04% |
| Esposende | 39,105 | 1.82% |
| Tomar | 37,420 | 0.51% |
| Chaves | 37,278 | -0.06% |
| Lagos | 36,361 | 1.58% |
| Odemira | 36,191 | 3.38% |
| Braganca | 36,177 | 0.83% |
| Cantanhede | 36,116 | 1.01% |
| Torres Novas | 35,446 | 0.66% |
| Benavente | 34,807 | 2.5% |
| Beja | 34,186 | 0.34% |
| Camara de Lobos | 33,867 | 0.94% |
| Espinho | 33,645 | 1.38% |
| Angra do Heroismo | 33,551 | -0.22% |
| Abrantes | 33,522 | -0.37% |
| Ribeira Grande | 32,835 | 0.67% |
| Lourinha | 30,398 | 2.42% |
| Anadia | 28,970 | 0.8% |
| Tavira | 28,782 | 0.88% |
| Peniche | 28,527 | 1.31% |
| Santiago do Cacem | 28,472 | 0.31% |
| Estarreja | 28,146 | 1.22% |
| Fundao | 27,746 | 0.84% |
| Oliveira do Bairro | 27,240 | 2.8% |
| Albergaria-a-Velha | 26,866 | 1.32% |
| Lagoa | 26,543 | 1.96% |
| Vagos | 26,448 | 2.51% |
| Tondela | 26,027 | 0.13% |
| Montemor-o-Velho | 25,415 | 0.56% |
| Cartaxo | 25,410 | 1.4% |
| Sao Joao da Madeira | 25,276 | 2.1% |
| Vizela | 25,104 | 0.84% |
| Salvaterra de Magos | 24,898 | 2.23% |
| Porto de Mos | 24,865 | 1.13% |
| Azambuja | 24,496 | 2.21% |
| Lamego | 23,915 | -0.25% |
| Entroncamento | 23,841 | 2.7% |
| Almeirim | 23,604 | 1.11% |
| Povoa de Lanhoso | 23,501 | 1.24% |
| Rio Maior | 23,454 | 1.7% |
| Portalegre | 21,435 | -0.74% |
| Mirandela | 21,364 | 0.05% |
| Seia | 21,233 | -0.41% |
| Vale de Cambra | 21,210 | -0.07% |
| Alcochete | 21,141 | 1.64% |
| Arcos de Valdevez | 20,924 | 0.25% |
| Arouca | 20,694 | -0.32% |
| Amares | 20,429 | 1.62% |
| Mealhada | 20,350 | 0.81% |
| Elvas | 20,135 | -0.47% |
| Vila da Praia da Vitoria | 20,023 | 0.41% |
| Vila Real de Santo Antonio | 19,966 | 1.07% |
| Machico | 19,725 | 0.12% |
| Oliveira do Hospital | 19,724 | 0.29% |
| Mangualde | 19,065 | 0.79% |
| Condeixa-a-Nova | 18,512 | 1.75% |
| Moncao | 18,116 | 0.31% |
| Lousa | 18,012 | 0.99% |
| Batalha | 17,656 | 2.23% |
| Celorico de Basto | 17,656 | 0.05% |
| Soure | 17,334 | 0.09% |
| Coruche | 17,205 | -0.27% |
| Caminha | 17,058 | 1.35% |
| Cinfaes | 17,028 | -0.77% |
| Baiao | 16,867 | -0.65% |
| Arruda dos Vinhos | 16,692 | 2.94% |
| Nazare | 16,429 | 1.79% |
| Montemor-o-Novo | 15,869 | -0.14% |
| Lagoa (R.A.A.) | 15,588 | 1.5% |
| Cabeceiras de Basto | 15,553 | 0.05% |
| Sao Pedro do Sul | 15,394 | 0.32% |
| Castelo de Paiva | 15,373 | -0.07% |
| Cadaval | 15,338 | 2.11% |
| Serta | 15,057 | 0.25% |
| Ponte de Sor | 15,038 | -0.28% |
| Bombarral | 15,030 | 2.62% |
| Sines | 15,021 | 0.76% |
| Obidos | 14,676 | 3.42% |
| Valenca | 14,650 | 1.23% |
| Valpacos | 14,507 | -0.08% |
| Horta | 14,494 | 0.1% |
| Grandola | 14,403 | 0.62% |
| Macedo de Cavaleiros | 14,320 | 0.23% |
| Peso da Regua | 14,140 | -0.47% |
| Castro Daire | 13,877 | 0.32% |
| Nelas | 13,725 | 0.8% |
| Ribeira Brava | 13,673 | 1.31% |
| Serpa | 13,614 | -0.22% |
| Moura | 13,341 | 0.04% |
| Alcanena | 13,107 | 0.89% |
| Mira | 13,063 | 1.34% |
| Sobral de Monte Agraco | 13,009 | 3.21% |
| Penacova | 12,918 | -0.12% |
| Miranda do Corvo | 12,408 | 0.57% |
| Gouveia | 12,361 | 0.24% |
| Estremoz | 12,320 | -0.65% |
| Vieira do Minho | 12,126 | 0.25% |
| Ansiao | 12,096 | 0.69% |
| Tabua | 12,095 | 1.32% |
| Sao Bras de Alportel | 11,982 | 1.07% |
| Murtosa | 11,865 | 2.2% |
| Vila Pouca de Aguiar | 11,838 | 0.08% |
| Vendas Novas | 11,748 | 0.68% |
| Calheta (R.A.M.) | 11,669 | 1.28% |
| Arganil | 11,653 | 0.89% |
| Satao | 11,431 | 0.73% |
| Ponte da Barca | 11,322 | 0.5% |
| Sabugal | 11,264 | -0.12% |
| Santa Comba Dao | 11,189 | 0.76% |
| Sever do Vouga | 11,035 | 0.05% |
| Alcacer do Sal | 10,994 | -0.19% |
| Vila Franca do Campo | 10,375 | 0.04% |
| Alijo | 10,202 | -0.46% |
| Oliveira de Frades | 9,980 | 0.71% |
| Moimenta da Beira | 9,971 | 0.99% |
| Vouzela | 9,889 | 0.42% |
| Reguengos de Monsaraz | 9,830 | -0.05% |
| Vila Nova de Cerveira | 9,714 | 1.53% |
| Resende | 9,410 | -1.13% |
| Carregal do Sal | 9,388 | 0.69% |
| Ponta do Sol | 9,235 | 1.75% |
| Mortagua | 9,183 | 0.43% |
| Montalegre | 9,039 | -0.33% |
| Aljustrel | 8,935 | 0.07% |
| Paredes de Coura | 8,698 | 0.06% |
| Idanha-a-Nova | 8,642 | 0.59% |
| Vila Nova da Barquinha | 8,575 | 3.33% |
| Chamusca | 8,547 | -0.01% |
| Trancoso | 8,410 | 0.05% |
| Ferreira do Zezere | 8,289 | 1.07% |
| Mogadouro | 8,090 | -0.49% |
| Ferreira do Alentejo | 7,952 | 0.32% |
| Tarouca | 7,933 | 1.47% |
| Campo Maior | 7,778 | -0.63% |
| Alpiarca | 7,770 | 1.83% |
| Pinhel | 7,698 | -0.76% |
| Penalva do Castelo | 7,478 | 0.43% |
| Melgaco | 7,473 | -0.56% |
| Vila Nova de Poiares | 7,439 | 1.21% |
| Castro Marim | 7,261 | 1.97% |
| Vila Vicosa | 7,195 | -0.5% |
| Vinhais | 7,186 | -1.16% |
| Proenca-a-Nova | 7,082 | -0.14% |
| Arraiolos | 6,971 | 0.74% |
| Castro Verde | 6,955 | 0.07% |
| Aljezur | 6,736 | 1.8% |
| Sao Joao da Pesqueira | 6,700 | -0.31% |
| Celorico da Beira | 6,691 | 0.42% |
| Madalena | 6,641 | 0.62% |
| Alvaiazere | 6,596 | 0.9% |
| Almodovar | 6,586 | -0.5% |
| Torre de Moncorvo | 6,552 | -0.65% |
| Santana | 6,516 | 0% |
| Vila Nova de Foz Coa | 6,445 | 0.48% |
| Macao | 6,373 | -0.2% |
| Mondim de Basto | 6,372 | -0.17% |
| Terras de Bouro | 6,353 | -0.03% |
| Borba | 6,327 | -0.39% |
| Belmonte | 6,309 | 0.35% |
| Redondo | 6,296 | 0.05% |
| Vila do Bispo | 6,211 | 1.34% |
| Miranda do Douro | 6,106 | -0.92% |
| Porto Santo | 6,090 | 3.2% |
| Vila Flor | 6,004 | -0.15% |
| Mertola | 5,951 | -0.95% |
| Sernancelhe | 5,902 | 0.72% |
| Santa Marta de Penaguiao | 5,894 | -0.46% |
| Povoacao | 5,884 | 0% |
| Penela | 5,862 | 1.3% |
| Ribeira de Pena | 5,834 | -0.05% |
| Portel | 5,717 | -0.14% |
| Viana do Alentejo | 5,691 | 0.89% |
| Sabrosa | 5,669 | 0.37% |
| Armamar | 5,572 | -0.55% |
| Golega | 5,545 | 0.51% |
| Almeida | 5,542 | -0.82% |
| Vila do Porto | 5,516 | 0.11% |
| Nisa | 5,510 | -1.09% |
| Figueiro dos Vinhos | 5,373 | 0.45% |
| Aguiar da Beira | 5,337 | 0.11% |
| Carrazeda de Ansiaes | 5,333 | -0.32% |
| Sao Vicente | 5,308 | 1.78% |
| Vidigueira | 5,285 | 0.23% |
| Monchique | 5,278 | -0.55% |
| Murca | 5,230 | 0% |
| Tabuaco | 5,028 | -0.02% |
| Figueira de Castelo Rodrigo | 4,976 | -0.44% |
| Velas | 4,948 | -0.02% |
| Vila Nova de Paiva | 4,942 | 1.08% |
| Alandroal | 4,936 | -0.36% |
| Oleiros | 4,901 | -0.12% |
| Penamacor | 4,846 | 0.27% |
| Boticas | 4,769 | -0.65% |
| Ourique | 4,764 | -0.23% |
| Meda | 4,584 | -0.11% |
| Cuba | 4,509 | 0.45% |
| Nordeste | 4,439 | 0% |
| Lajes do Pico | 4,399 | 0.02% |
| Sousel | 4,392 | -0.11% |
| Fornos de Algodres | 4,391 | -0.09% |
| Pampilhosa da Serra | 4,263 | 0.97% |
| Vimioso | 4,200 | 0.31% |
| Constancia | 4,161 | 1.74% |
| Mora | 4,141 | -0.24% |
| Alfandega da Fe | 4,119 | -0.7% |
| Santa Cruz da Graciosa | 4,044 | -0.32% |
| Pedrogao Grande | 3,875 | 2.08% |
| Gois | 3,852 | 0.39% |
| Avis | 3,723 | -0.48% |
| Sardoal | 3,702 | 0.87% |
| Vila Velha de Rodao | 3,678 | 1.41% |
| Sao Roque do Pico | 3,578 | 1.68% |
| Vila de Rei | 3,505 | 0.72% |
| Calheta (R.A.A.) | 3,464 | -0.32% |
| Mesao Frio | 3,392 | -0.82% |
| Alter do Chao | 3,281 | 0.92% |
| Crato | 3,255 | 0.09% |
| Gaviao | 3,187 | -1.18% |
| Castelo de Vide | 3,164 | -0.25% |
| Monforte | 3,029 | 0.2% |
| Fronteira | 2,993 | 0.3% |
| Marvao | 2,988 | -0.53% |
| Freixo de Espada a Cinta | 2,956 | -1.7% |
| Manteigas | 2,952 | 0% |
| Penedono | 2,818 | 0.18% |
| Castanheira de Pera | 2,800 | 0.79% |
| Arronches | 2,753 | -0.25% |
| Porto Moniz | 2,669 | 1.37% |
| Mourao | 2,466 | 0.69% |
| Alcoutim | 2,328 | -1.52% |
| Alvito | 2,309 | 0.13% |
| Santa Cruz das Flores | 2,144 | 0.7% |
| Lajes das Flores | 1,482 | 0.88% |
| Barrancos | 1,362 | -1.87% |
| Corvo | 452 | 1.57% |
