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São Martinho

Parish of the municipality of Seia (Seia), district of Guarda.

São Martinho had 515 residents in the 2021 Census, 37,9% of whom were aged 65 or over, and 5,5% of the population aged 15 or over had completed higher education. It borders 4 parishes and its centroid is 7,9 km in a straight line from the centroid of the municipality of Seia.

Population (inh.)
  • 144 – 245
  • 331 – 508
  • 515 – 725
  • 727 – 1.163
  • 1.265 – 5.963
Density (inh./km²)
  • 8,8 – 13,6
  • 20,1 – 31,5
  • 35,6 – 58,4
  • 59,6 – 87,3
  • 101,0 – 251,6
Area (km²)
  • 6,7 – 7,8
  • 8,3 – 11,8
  • 12,1 – 15,9
  • 17,7 – 26,2
  • 36,3 – 56,5
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 Seia

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

#ParishPopulationArea (km²)Inhab./km²
1Alvoco da Serra33137,578,8
2Girabolhos24117,7413,6
3Lapa dos Dinheiros2017,5726,6
4Loriga84836,2523,4
5Paranhos1.26521,2359,6
6Pinhanços7278,3387,3
7Sabugueiro40540,0710,1
8Sandomil74513,2256,4
9Santa Comba72511,8361,3
10Santa Marinha8508,42101,0
11Santiago1.1637,43156,5
12Sazes da Beira2457,7931,5
13Seia5.96323,70251,6
14São Martinho5156,6677,3
15São Romão2.54122,53112,8
16Teixeira14415,929,1
17Travancinha38712,4731,0
18União das freguesias de Carragozela e Várzea de Meruge54610,0854,2
19União das freguesias de Sameice e Santa Eulália50814,2735,6
20União das freguesias de Torrozelo e Folhadosa70810,2069,4
21União das freguesias de Tourais e Lajes1.52926,1858,4
22União das freguesias de Vide e Cabeça57056,4710,1
23Valezim24312,0920,1
24Vila Cova à Coelheira3557,6846,2
Code (DTMNFR)
091239
Resident population (2021)
515
Area
6,66 km²
Density
77,3 inh./km²
Share of the municipality (population)
2,4%
Rank in the municipality (population)
14th 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
251 (48,7%)
Women
264 (51,3%)
Portuguese nationality
514 (99,8%)
Foreign nationality
1 (0,2%)
Ageing index
423,9 elderly per 100 young people
Private households
232
Dwellings
406
Classic family dwellings
405
Buildings
403
Buildings with 7 or more floors
0
With higher education (15+)
5,5% (26)
Unemployment rate †
4,92%
Active / employed population
183 / 174

Population by age group

Population by age group0-14 years: 46 (8,9%); 15-24 years: 35 (6,8%); 25-64 years: 239 (46,4%); 65+ years: 195 (37,9%)0-1446 · 8,9%15-2435 · 6,8%25-64239 · 46,4%65+195 · 37,9%
Residents by age group and share of the total (515).
Age groupTotalMenWomen
0-14 years462125
15-24 years352411
25-64 years239119120
65+ years19587108

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

Seia · Santa Marinha · Paços da Serra (Gouveia) · Sabugueiro

Straight-line distance to the centroid of the municipality of Seia
7,9 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
540
Voters
388
Turnout
71,85%
Seats
7
ListVotes%Seats
PS
Partido Socialista		19450,00%4
PPD/PSD
Partido Social Democrata		17545,10%3
Blank votes102,58%
Null votes92,32%

Most-voted list, which elects the parish-council president: PS.

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
Largo de Santo António, SN
São Martinho
6270-222 São Martinho SEI
Email
jfsaomartinho@outlook.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