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União das freguesias de Alenquer (Santo Estêvão e Triana)

Parish of the municipality of Alenquer (Alenquer), district of Lisboa.

União das freguesias de Alenquer (Santo Estêvão e Triana) had 12.026 residents in the 2021 Census, 17,4% of whom were aged 65 or over, and 20,5% of the population aged 15 or over had completed higher education. It borders 6 parishes and its centroid is 5,5 km in a straight line from the centroid of the municipality of Alenquer.

Population (inh.)
  • 1.049 – 1.494
  • 1.565 – 1.617
  • 1.806 – 2.000
  • 2.911 – 4.157
  • 12.026 – 14.622
Density (inh./km²)
  • 25,8 – 81,5
  • 86,5 – 90,1
  • 90,1 – 104,1
  • 114,5 – 217,6
  • 240,1 – 596,3
Area (km²)
  • 8,3 – 18,1
  • 18,3 – 22,2
  • 24,5 – 28,0
  • 28,1 – 46,2
  • 46,3 – 50,1
Quantile classes · current parish
Parish highlighted. Click a neighbouring parish to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

The 11 parishes of Alenquer

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#ParishPopulationArea (km²)Inhab./km²
1Carnota1.56518,0986,5
2Meca1.61714,12114,5
3Olhalvo1.8068,30217,6
4Ota1.19546,3225,8
5União das freguesias de Abrigada e Cabanas de Torres4.15746,1590,1
6União das freguesias de Aldeia Galega da Merceana e Aldeia Gavinha2.91127,96104,1
7União das freguesias de Alenquer (Santo Estêvão e Triana)12.02650,08240,1
8União das freguesias de Carregado e Cadafais14.62224,52596,3
9União das freguesias de Ribafria e Pereiro de Palhacana1.49418,3481,5
10Ventosa2.00022,2190,1
11Vila Verde dos Francos1.04928,1337,3
Code (DTMNFR)
110119
Resident population (2021)
12.026
Area
50,08 km²
Density
240,1 inh./km²
Share of the municipality (population)
27,1%
Rank in the municipality (population)
2nd of 11

Simplified designation (CAOP2025): “Alenquer (Santo Estêvão e Triana)”.

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
5.823 (48,4%)
Women
6.203 (51,6%)
Portuguese nationality
11.533 (95,9%)
Foreign nationality
493 (4,1%)
Ageing index
105,9 elderly per 100 young people
Private households
4.646
Average household size *
2,56 people
Dwellings
5.894
Classic family dwellings
5.890
Buildings
3.551
Buildings with 7 or more floors
15
With higher education (15+)
20,5% (2.065)
Unemployment rate *
5,45% (H 4,64% · M 6,29%)
Active / employed population
6.108 / 5.775

Population by age group

Population by age group0-14 years: 1.973 (16,4%); 15-24 years: 1.393 (11,6%); 25-64 years: 6.570 (54,6%); 65+ years: 2.090 (17,4%)0-141.973 · 16,4%15-241.393 · 11,6%25-646.570 · 54,6%65+2.090 · 17,4%
Residents by age group and share of the total (12.026).
Age groupTotalMenWomen
0-14 years1.9731.002971
15-24 years1.393717676
25-64 years6.5703.1643.406
65+ years2.0909401.150

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

União das freguesias de Carregado e Cadafais · Ota · Meca · Vila Nova da Rainha (Azambuja) · Carnota · Azambuja (Azambuja)

Straight-line distance to the centroid of the municipality of Alenquer
5,5 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
10.391
Voters
6.458
Turnout
62,15% (2021: 50,33%)
Seats
13
ListVotes%Seats
PPD/PSD.CDS-PP.IL.PPM.MPT.NC
TODOS		2.29935,60%5
PS
Partido Socialista		1.70626,42%4
CH
CHEGA		96514,94%2
MIUFA
Movimento Independente à União das Freguesias de Alenquer		85213,19%1
PCP-PEV
CDU - Coligação Democrática Unitária		4386,78%1
Blank votes1422,20%
Null votes560,87%

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

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.

Heraldry

Coat of arms: escudo de azul, alão deitado de ouro, animado e lampassado de vermelho, com a pata direita sobre a esquerda e, entre elas, uma chave de vermelho; em chefe, coroa fechada de ouro, com pedraria de vermelho, e livro aberto de prata, pintado de vermelho e realçado de negro, alinhados em faixa; campanha ondada de quatro tiras ondadas, de prata e azul. Coroa mural de prata de quatro torres. Listel de prata com a legenda a negro «união das freguesias de alenquer (santo estêvão e triana)».

Flag: branca; cordões e borlas de prata e azul. Haste e lança douradas.

Seal: nos termos do artigo 18 da Lei 53/91, com a legenda «União das Freguesias de Alenquer (Santo Estêvão e Triana)».

Heraldic ordinance published by Edital n.º 115/2015, Diário da República n.º 29/2015, Série II de 2015-02-11 (issuer: União das Freguesias de Alenquer (Santo Estêvão e Triana)). Excerpt of the official text (coat of arms, flag and seal), reproduced unchanged.

Parish-council contacts

Address
Rua Detrás da Misericordia Vila- Alta
Santo Estêvão (ALENQUER)
2580-297 ALENQUER
Telephone
263732893
Fax
263732763
Email
geral@freguesiaalenquer.pt

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

More information

Coordinates
39,05500, -9,01000
Wikipedia
Alenquer (Santo Estêvão e Triana)
Wikidata
Q17510713

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