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São Martinho do Porto

Parish of the municipality of Alcobaça (Alcobaça), district of Leiria.

São Martinho do Porto had 3.111 residents in the 2021 Census, 28,2% of whom were aged 65 or over, and 18,1% of the population aged 15 or over had completed higher education. It borders 3 parishes and its centroid is 11,6 km in a straight line from the centroid of the municipality of Alcobaça.

Population (inh.)
  • 1.411 – 1.846
  • 2.826 – 3.111
  • 3.669 – 4.141
  • 4.438 – 6.729
  • 7.243 – 8.480
Density (inh./km²)
  • 75,4 – 86,9
  • 94,0 – 109,4
  • 119,1 – 130,2
  • 131,1 – 212,5
  • 290,6 – 738,3
Area (km²)
  • 9,8 – 14,6
  • 15,0 – 25,8
  • 28,0 – 29,2
  • 37,5 – 42,4
  • 47,9 – 87,1
Quantile classes · current parish
Parish highlighted. Click a neighbouring parish to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

The 13 parishes of Alcobaça

Hover a row to highlight it on the map. Click a header to sort.

#ParishPopulationArea (km²)Inhab./km²
1Alfeizerão3.66927,99131,1
2Aljubarrota6.24347,94130,2
3Benedita8.48029,18290,6
4Bárrio1.41115,0194,0
5Cela3.07525,83119,1
6Maiorga1.84610,04183,9
7São Martinho do Porto3.11114,64212,5
8Turquel4.43840,57109,4
9União das freguesias de Alcobaça e Vestiaria7.2439,81738,3
10União das freguesias de Coz, Alpedriz e Montes2.82637,4775,4
11União das freguesias de Pataias e Martingança6.72987,0877,3
12Vimeiro1.75320,1786,9
13Évora de Alcobaça4.14142,4297,6
Code (DTMNFR)
100112
Resident population (2021)
3.111
Area
14,64 km²
Density
212,5 inh./km²
Share of the municipality (population)
5,7%
Rank in the municipality (population)
8th of 13

INE, Censos 2021 (população residente por freguesia, geografia 2025, ind. 0014584); DGT, CAOP2025 (área). Population refers to the 2021 census moment, compiled by INE for the parish boundaries in force in 2025.

2021 Census in detail

Men
1.473 (47,3%)
Women
1.638 (52,7%)
Portuguese nationality
2.759 (88,7%)
Foreign nationality
352 (11,3%)
Ageing index
244,7 elderly per 100 young people
Private households
1.411
Average household size *
2,18 people
Dwellings
5.000
Classic family dwellings
4.994
Buildings
2.383
Buildings with 7 or more floors
13
With higher education (15+)
18,1% (499)
Unemployment rate *
7,56% (H 6,71% · M 8,44%)
Active / employed population
1.323 / 1.223

Population by age group

Population by age group0-14 years: 358 (11,5%); 15-24 years: 296 (9,5%); 25-64 years: 1.581 (50,8%); 65+ years: 876 (28,2%)0-14358 · 11,5%15-24296 · 9,5%25-641.581 · 50,8%65+876 · 28,2%
Residents by age group and share of the total (3.111).
Age groupTotalMenWomen
0-14 years358190168
15-24 years296145151
25-64 years1.581759822
65+ years876379497

Source: INE, Censos 2021 — indicators 0014630, 0014631, 0014627, 0014623, 0014621, 0014635, 0014636, 0012481, 0012328, 0014632, obtained from the INE indicators API on 24/09/2026 (licence CC BY 4.0). Parish geography of 2025 (CAOP2025). Nationality (Portuguese, foreign, stateless) is INE indicator 0014632. * Indicator published by INE only for 2013 parish geography (NUTS 2024); used because the parish has the same territory in both geographies (identical population by sex and age group). Ageing index = population aged 65+ ÷ population aged 0–14 × 100; share with higher education = residents with completed higher education ÷ residents aged 15 or over (our calculations from INE figures).

Neighbouring parishes

Alfeizerão · Famalicão (Nazaré) · União das freguesias de Tornada e Salir do Porto (Caldas da Rainha)

Straight-line distance to the centroid of the municipality of Alcobaça
11,6 km

Neighbourhood calculated from official boundaries: DGT, Carta Administrativa Oficial de Portugal (CAOP) 2025 (licence CC BY 4.0); two parishes are neighbours when they share a boundary segment. The distance is the straight-line (great-circle) distance between the geometric centroid of the parish and that of the municipality (in territories with islets, of the main part), not a road distance.

2025 local elections — Parish assembly

Registered voters
2.929
Voters
1.680
Turnout
57,36% (2021: 52,37%)
Seats
9
ListVotes%Seats
PPD/PSD
Partido Social Democrata		52931,49%3
IL
Iniciativa Liberal		49429,40%3
SMPD
São Martinho Pra Diante		27916,61%2
PS
Partido Socialista		20912,44%1
CH
CHEGA		1086,43%0
Blank votes311,85%
Null votes301,79%

Most-voted list, which elects the parish-council president: PPD/PSD.

Source: SGMAI — official results of the local elections of 12 October 2025 (Secretary-General of the Ministry of Internal Administration), consulted on 25/09/2026. Percentages calculated by SGMAI over total voters.

Parish-council contacts

Address
Rua Professor Eliseu, N.º 2
São Martinho do Porto (ALCOBAÇA)
2460-676 SÃO MARTINHO DO PORTO
Telephone
262989188
Fax
262989333
Email
geral@freguesiasaomartinhodoporto.pt

Source: DGAL - Portal Autárquico (Direção-Geral das Autarquias Locais), consulted on 25/09/2026.

More information

Coordinates
39,51306, -9,13556
Wikipedia
São Martinho do Porto
Wikidata
Q2035277

Source: Wikidata (data under CC0 1.0), consulted on 24/09/2026. The patron saint and coordinates are those recorded on Wikidata.

Sources: INE, 2021 Census (resident population) · DGT, CAOP2025 (area and parishes) · more details · Data updated on 24/09/2026