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São Martinho de Sardoura

Parish of the municipality of Castelo de Paiva (Castelo de Paiva), district of Aveiro.

São Martinho de Sardoura had 1.849 residents in the 2021 Census, 17,6% of whom were aged 65 or over, and 7,8% of the population aged 15 or over had completed higher education. It borders 5 parishes and its centroid is 4,3 km in a straight line from the centroid of the municipality of Castelo de Paiva.

Population (inh.)
  • 847 – 1.194
  • 1.277 – 1.313
  • 1.849 – 1.926
  • 2.048 – 2.274
  • 2.858
Density (inh./km²)
  • 37,0 – 37,0
  • 108,5 – 133,3
  • 220,4 – 232,0
  • 303,3 – 423,1
  • 541,3
Area (km²)
  • 4,2 – 4,4
  • 5,3 – 8,7
  • 9,8 – 12,1
  • 15,4 – 22,9
  • 32,3
Quantile classes · current parish
Parish highlighted. Click a neighbouring parish to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

The 9 parishes of Castelo de Paiva

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

#ParishPopulationArea (km²)Inhab./km²
1Bairros1.9268,74220,4
2Fornos1.2774,21303,3
3Paraíso84722,8937,0
4Pedorido1.31312,10108,5
5Raiva2.04815,37133,3
6Real1.19432,2537,0
7Santa Maria de Sardoura2.2749,80232,0
8Sobrado2.8585,28541,3
9São Martinho de Sardoura1.8494,37423,1
Code (DTMNFR)
010608
Resident population (2021)
1.849
Area
4,37 km²
Density
423,1 inh./km²
Share of the municipality (population)
11,9%
Rank in the municipality (population)
5th of 9

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
877 (47,4%)
Women
972 (52,6%)
Portuguese nationality
1.842 (99,6%)
Foreign nationality
7 (0,4%)
Ageing index
130,4 elderly per 100 young people
Private households
649
Average household size *
2,85 people
Dwellings
798
Classic family dwellings
798
Buildings
632
Buildings with 7 or more floors
0
With higher education (15+)
7,8% (124)
Unemployment rate *
7,60% (H 4,24% · M 12,06%)
Active / employed population
868 / 802

Population by age group

Population by age group0-14 years: 250 (13,5%); 15-24 years: 241 (13,0%); 25-64 years: 1.032 (55,8%); 65+ years: 326 (17,6%)0-14250 · 13,5%15-24241 · 13,0%25-641.032 · 55,8%65+326 · 17,6%
Residents by age group and share of the total (1.849).
Age groupTotalMenWomen
0-14 years250118132
15-24 years241109132
25-64 years1.032509523
65+ years326141185

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

Santa Maria de Sardoura · Sobrado · Alpendorada, Várzea e Torrão (Marco de Canaveses) · Real · Fornos

Straight-line distance to the centroid of the municipality of Castelo de Paiva
4,3 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
1.588
Voters
1.357
Turnout
85,45% (2021: 82,63%)
Seats
9
ListVotes%Seats
PPD/PSD
Partido Social Democrata		70952,25%5
PS
Partido Socialista		61945,62%4
Blank votes141,03%
Null votes151,11%

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
Lugar da Vinha de Além
São Martinho de Sardoura (CASTELO DE PAIVA)
4550-865 SÃO MARTINHO DE SARDOURA
Telephone
255698055
Fax
255698055
Email
jfsmartinho@hotmail.com

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

More information

Coordinates
41,06833, -8,29000
Wikipedia
São Martinho de Sardoura
Wikidata
Q1023362

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