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Santa Marinha

Parish of the municipality of Vila Nova de Gaia (Vila Nova de Gaia), district of Porto.

Santa Marinha had 30.315 residents in the 2021 Census, 22,3% of whom were aged 65 or over, and 25,0% of the population aged 15 or over had completed higher education. It borders 9 parishes and its centroid is 7,2 km in a straight line from the centroid of the municipality of Vila Nova de Gaia.

Population (inh.)
  • 1.392 – 3.717
  • 5.461 – 10.551
  • 10.626 – 13.560
  • 13.918 – 18.409
  • 22.615 – 38.859
Density (inh./km²)
  • 333,4 – 838,6
  • 937,9 – 1.228,6
  • 1.253,1 – 2.073,5
  • 2.132,4 – 2.999,3
  • 3.141,6 – 7.359,7
Area (km²)
  • 1,0 – 4,7
  • 5,1 – 5,5
  • 5,9 – 7,5
  • 7,8 – 8,8
  • 8,9 – 19,4
Quantile classes · current parish
Parish highlighted. Click a neighbouring parish to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

The 24 parishes of Vila Nova de Gaia

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

#ParishPopulationArea (km²)Inhab./km²
1Arcozelo15.1448,501.781,7
2Avintes10.8368,821.228,6
3Canelas13.9186,902.017,1
4Canidelo28.0548,933.141,6
5Crestuma2.3734,68507,1
6Grijó10.62611,33937,9
7Gulpilhares11.6645,472.132,4
8Lever2.6147,84333,4
9Madalena10.5514,692.249,7
10Mafamude38.8595,287.359,7
11Olival5.5088,07682,5
12Oliveira do Douro22.6157,542.999,3
13Pedroso18.40919,43947,5
14Perosinho6.1425,291.161,1
15Sandim5.46113,56402,7
16Santa Marinha30.3155,925.120,8
17Seixezelo1.8171,451.253,1
18Sermonde1.3921,66838,6
19Serzedo7.6036,681.138,2
20São Félix da Marinha13.5607,931.710,0
21São Pedro da Afurada3.7171,003.717,0
22Valadares10.6585,142.073,5
23Vilar de Andorinho18.0037,072.546,4
24Vilar do Paraíso13.9855,302.638,7
Code (DTMNFR)
131741
Resident population (2021)
30.315
Area
5,92 km²
Density
5.120,8 inh./km²
Share of the municipality (population)
10,0%
Rank in the municipality (population)
2nd of 24

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
14.032 (46,3%)
Women
16.283 (53,7%)
Portuguese nationality
28.429 (93,8%)
Foreign nationality
1.886 (6,2%)
Ageing index
183,9 elderly per 100 young people
Private households
13.188
Dwellings
16.276
Classic family dwellings
16.265
Buildings
4.919
Buildings with 7 or more floors
288
With higher education (15+)
25,0% (6.659)
Unemployment rate †
12,54%
Active / employed population
14.977 / 13.099

Population by age group

Population by age group0-14 years: 3.673 (12,1%); 15-24 years: 2.823 (9,3%); 25-64 years: 17.064 (56,3%); 65+ years: 6.755 (22,3%)0-143.673 · 12,1%15-242.823 · 9,3%25-6417.064 · 56,3%65+6.755 · 22,3%
Residents by age group and share of the total (30.315).
Age groupTotalMenWomen
0-14 years3.6731.8871.786
15-24 years2.8231.4481.375
25-64 years17.0647.8779.187
65+ years6.7552.8203.935

Source: INE, Censos 2021 — indicators 0014630, 0014631, 0014627, 0014623, 0014621, 0014635, 0014636, 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. † Unemployment rate calculated by us: (active population − employed population) ÷ active population × 100 (indicators 0014635 and 0014636, 2025 geography). 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

Canidelo · Mafamude · São Pedro da Afurada · União das freguesias de Cedofeita, Santo Ildefonso, Sé, Miragaia, São Nicolau e Vitória (Porto) · União das freguesias de Lordelo do Ouro e Massarelos (Porto) · Vilar do Paraíso · Oliveira do Douro · Madalena · Bonfim (Porto)

Straight-line distance to the centroid of the municipality of Vila Nova de Gaia
7,2 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
26.418
Voters
13.881
Turnout
52,54%
Seats
19
ListVotes%Seats
PPD/PSD.CDS-PP.IL
GAIA SEMPRE NA FRENTE		4.98635,92%8
PS
Partido Socialista		4.76734,34%7
CH
CHEGA		1.63211,76%2
BE + L
BLOCO + LIVRE		9246,66%1
PCP-PEV
CDU - Coligação Democrática Unitária		7495,40%1
PLS
PARTIDO LIBERAL SOCIAL		1210,87%0
ADN
ALTERNATIVA DEMOCRÁTICA NACIONAL		1090,79%0
Blank votes3722,68%
Null votes2211,59%

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

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 Cândido dos Reis, 545
Santa Marinha
4400-075 Vila Nova de Gaia
Email
geral@santamarinha-gaia.pt

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

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