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União das freguesias de Oeiras e São Julião da Barra, Paço de Arcos e Caxias

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

União das freguesias de Oeiras e São Julião da Barra, Paço de Arcos e Caxias had 58.094 residents in the 2021 Census, 25,6% of whom were aged 65 or over, and 40,3% of the population aged 15 or over had completed higher education. It borders 6 parishes and its centroid is 2,7 km in a straight line from the centroid of the municipality of Oeiras.

Population (inh.)
  • 14.451
  • 15.098
  • 36.079
  • 47.936
  • 58.094
Density (inh./km²)
  • 1.603,9
  • 2.057,0
  • 4.095,2
  • 4.293,7
  • 6.676,3
Area (km²)
  • 7,2
  • 7,3
  • 8,8
  • 9,0
  • 13,5
Quantile classes · current parish
Parish highlighted. Click a neighbouring parish to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

The 5 parishes of Oeiras

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

#ParishPopulationArea (km²)Inhab./km²
1Barcarena14.4519,011.603,9
2Porto Salvo15.0987,342.057,0
3União das freguesias de Algés, Linda-a-Velha e Cruz Quebrada-Dafundo47.9367,186.676,3
4União das freguesias de Carnaxide e Queijas36.0798,814.095,2
5União das freguesias de Oeiras e São Julião da Barra, Paço de Arcos e Caxias58.09413,534.293,7
Code (DTMNFR)
111014
Resident population (2021)
58.094
Area
13,53 km²
Density
4.293,7 inh./km²
Share of the municipality (population)
33,8%
Rank in the municipality (population)
1st of 5

Simplified designation (CAOP2025): “Oeiras e São Julião da Barra, Paço de Arcos e Caxias”.

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
26.606 (45,8%)
Women
31.488 (54,2%)
Portuguese nationality
53.335 (91,8%)
Foreign nationality
4.759 (8,2%)
Ageing index
200,6 elderly per 100 young people
Private households
25.746
Average household size *
2,22 people
Dwellings
31.345
Classic family dwellings
31.304
Buildings
6.171
Buildings with 7 or more floors
570
With higher education (15+)
40,3% (20.397)
Unemployment rate *
7,48% (H 7,65% · M 7,34%)
Active / employed population
27.182 / 25.148

Population by age group

Population by age group0-14 years: 7.426 (12,8%); 15-24 years: 5.869 (10,1%); 25-64 years: 29.906 (51,5%); 65+ years: 14.893 (25,6%)0-147.426 · 12,8%15-245.869 · 10,1%25-6429.906 · 51,5%65+14.893 · 25,6%
Residents by age group and share of the total (58.094).
Age groupTotalMenWomen
0-14 years7.4263.8513.575
15-24 years5.8692.9972.872
25-64 years29.90613.89416.012
65+ years14.8935.8649.029

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 Carcavelos e Parede (Cascais) · Porto Salvo · União das freguesias de Algés, Linda-a-Velha e Cruz Quebrada-Dafundo · Barcarena · São Domingos de Rana (Cascais) · União das freguesias de Carnaxide e Queijas

Straight-line distance to the centroid of the municipality of Oeiras
2,7 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
49.875
Voters
28.062
Turnout
56,26% (2021: 51,71%)
Seats
21
ListVotes%Seats
INOV25
Inovar União Oeiras 25		14.08050,17%12
PS - PAN
PS e PAN - EM OEIRAS TODOS CONTAM		3.79013,51%3
CH
CHEGA		2.89510,32%2
L.BE.VP
Coligação EVOLUIR OEIRAS		2.7129,66%2
IL
Iniciativa Liberal		2.1567,68%1
PCP-PEV
CDU - Coligação Democrática Unitária		1.1874,23%1
Blank votes8893,17%
Null votes3531,26%

Most-voted list, which elects the parish-council president: INOV25.

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
R. da Fundição de Oeiras - Edificio da CMO - Piso 0
Oeiras
2780-057 OEIRAS
Telephone
214416464
Fax
214416345
Email
geral@ufopac.pt
Website
www.ufopac.pt

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

More information

Coordinates
38,69200, -9,31300
Wikipedia
Oeiras e São Julião da Barra, Paço de Arcos e Caxias
Wikidata
Q18356251

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