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Algueirão-Mem Martins

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

Algueirão-Mem Martins had 68.649 residents in the 2021 Census, 16,4% of whom were aged 65 or over, and 19,1% of the population aged 15 or over had completed higher education. It borders 5 parishes and its centroid is 2,8 km in a straight line from the centroid of the municipality of Sintra.

Population (inh.)
  • 3.676 – 5.205
  • 7.746 – 12.788
  • 13.347 – 26.310
  • 29.896 – 41.323
  • 47.804 – 68.649
Density (inh./km²)
  • 199,4 – 232,1
  • 232,7 – 426,5
  • 470,4 – 3.001,2
  • 4.290,6 – 6.910,2
  • 7.191,2 – 15.470,6
Area (km²)
  • 2,2 – 3,6
  • 4,4 – 8,6
  • 15,7 – 16,5
  • 22,8 – 33,4
  • 39,8 – 63,6
Quantile classes · current parish
Parish highlighted. Click a neighbouring parish to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

The 15 parishes of Sintra

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

#ParishPopulationArea (km²)Inhab./km²
1Algueirão-Mem Martins68.64916,004.290,6
2Almargem do Bispo9.26139,80232,7
3Belas26.31022,841.151,9
4Casal de Cambra13.3472,176.150,7
5Colares7.74633,37232,1
6Montelavar3.6768,62426,5
7Pêro Pinheiro4.32515,65276,4
8Queluz26.1043,637.191,2
9Rio de Mouro49.48916,493.001,2
10São João das Lampas12.78857,50222,4
11Terrugem5.20526,10199,4
12União das freguesias de Agualva e Mira-Sintra41.3235,986.910,2
13União das freguesias de Massamá e Monte Abraão47.8043,0915.470,6
14União das freguesias de Sintra (Santa Maria e São Miguel, São Martinho e São Pedro de Penaferrim)29.89663,55470,4
15União das freguesias do Cacém e São Marcos39.6834,448.937,6
Code (DTMNFR)
111102
Resident population (2021)
68.649
Area
16,00 km²
Density
4.290,6 inh./km²
Share of the municipality (population)
17,8%
Rank in the municipality (population)
1st of 15

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
32.390 (47,2%)
Women
36.259 (52,8%)
Portuguese nationality
61.955 (90,2%)
Foreign nationality
6.693 (9,7%)
Stateless
1 (less than 0.1%)
Ageing index
107,4 elderly per 100 young people
Private households
26.950
Average household size *
2,51 people
Dwellings
30.880
Classic family dwellings
30.838
Buildings
7.726
Buildings with 7 or more floors
454
With higher education (15+)
19,1% (11.082)
Unemployment rate *
9,14% (H 8,33% · M 9,90%)
Active / employed population
35.332 / 32.103

Population by age group

Population by age group0-14 years: 10.505 (15,3%); 15-24 years: 8.364 (12,2%); 25-64 years: 38.495 (56,1%); 65+ years: 11.285 (16,4%)0-1410.505 · 15,3%15-248.364 · 12,2%25-6438.495 · 56,1%65+11.285 · 16,4%
Residents by age group and share of the total (68.649).
Age groupTotalMenWomen
0-14 years10.5055.2785.227
15-24 years8.3644.2224.142
25-64 years38.49518.19420.301
65+ years11.2854.6966.589

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 Sintra (Santa Maria e São Miguel, São Martinho e São Pedro de Penaferrim) · Pêro Pinheiro · Rio de Mouro · Belas · Almargem do Bispo

Straight-line distance to the centroid of the municipality of Sintra
2,8 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
56.856
Voters
28.083
Turnout
49,39% (2021: 38,63%)
Seats
21
ListVotes%Seats
PPD/PSD.IL.PAN
SEMPRE COM OS SINTRENSES		8.80031,34%7
PS.L
AS PESSOAS, SEMPRE - COLIGAÇÃO PS/L		8.59730,61%7
CH
CHEGA		7.11925,35%6
PCP-PEV
CDU - Coligação Democrática Unitária		1.5495,52%1
CDS-PP/PPM/ADN
Por Sintra, a Nossa Casa		6212,21%0
B.E.
Bloco de Esquerda		5782,06%0
ND
NOVA DIREITA		1340,48%0
Blank votes3941,40%
Null votes2911,04%

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

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
Estrada de Mem Martins, nº 222
Algueirao-Mem Martins
2725-383 MEM MARTINS
Telephone
219229450
Fax
219229459
Email
geral@jfamm.pt
Website
www.jfamm.pt

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

More information

Coordinates
38,79411, -9,34511
Wikipedia
Algueirão-Mem Martins
Wikidata
Q180972

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