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Rio Maior

Municipality of the district of Santarém (District of Santarém), region Oeste e Vale do Tejo (NUTS III: Lezíria do Tejo).

Rio Maior had 21.004 residents in the 2021 Census, of whom 23,9% were aged 65 or over; 13,2% of the population aged 15 or over had completed higher education.

Arriving here

21.004inhabitants (2021 Census)
243district-seat telephone code
1town hall10parish councils12schools

Mayor: Luís Filipe Santana Dias · Tel. 243999300 · Email: geral@cm-riomaior.pt · www.cm-riomaior.pt more contacts

Summary for arrivals. The telephone code is that of the district/region seat (ANACOM numbering plan), not exclusive to this municipality. School, parish-council and town-hall counts come from the official lists already on this site. Hospitals are NHS institutions whose official name includes the municipality.

Population (inh.)
  • 462 – 634
  • 792 – 797
  • 817 – 957
  • 1.124 – 1.170
  • 1.735 – 12.516
Density (inh./km²)
  • 22,8 – 30,0
  • 39,1 – 50,7
  • 53,7 – 54,2
  • 56,0 – 58,0
  • 67,3 – 137,5
Area (km²)
  • 14,2 – 14,8
  • 15,4 – 16,1
  • 16,7 – 20,2
  • 24,5 – 27,9
  • 32,0 – 91,0
Quantile classes
Hover (or tap) a parish to see the figures; click to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

The 10 parishes of Rio Maior

Sorted by resident population (2021 Census, 2025 geography). Click a header to sort; hover a row to highlight it on the map.

Download CSV parish list (UTF-8)

#ParishPopulationArea (km²)Inhab./km²
1Rio Maior12.51691,00137,5
2Alcobertas1.73532,0354,2
3União das freguesias de São João da Ribeira e Ribeira de São João1.17020,1758,0
4Asseiceira1.12416,7167,3
5União das freguesias de Outeiro da Cortiçada e Arruda dos Pisões95724,4839,1
6Fráguas81716,1250,7
7União das freguesias de Azambujeira e Malaqueijo79714,8453,7
8União das freguesias de Marmeleira e Assentiz79214,1556,0
9Arrouquelas63427,8522,8
10São Sebastião46215,4030,0
INE code (DTMN)
1414
Resident population
21.004
Area
272,76 km²
Density
77,0 inh./km²
Parishes
10
Share of district population
4,9%
Rank in the district (population)
10th of 21
National rank (population)
117th of 308
National rank (density)
144th of 308
National rank (area)
115th of 308

INE, Censos 2021 (população residente, ind. 0014525, via dados.gov.pt); DGT, CAOP2025 (área e freguesias)

2021 Census in detail

Men
10.239 (48,7%)
Women
10.765 (51,3%)
Portuguese nationality
19.519 (92,9%)
Foreign nationality
1.485 (7,1%)
Ageing index
179,5 elderly per 100 young people
Private households
8.454
Average household size
2,45 people
Dwellings
12.259
Buildings
9.616
With higher education (15+)
13,2% (2.395)
Unemployment rate
5,03%

Population by age group

0-142.801 · 13,3%15-242.237 · 10,7%25-6410.938 · 52,1%65+5.028 · 23,9%
Residents by age group (21.004 in total).

Source: INE, Censos 2021 (API de indicadores) — indicators 0014630, 0014631, 0014627, 0014623, 0014621, 0014635, 0014636, 0012328, 0012481, 0014632, licence CC BY 4.0.

2025 local elections

Municipal council

Registered
17.909
Voters
10.879 (60,75%)
Seats
7
ListVotes%Seats
PPD/PSD.CDS-PP (elected council president)5.83153,60%4
PS3.56432,76%3
VP5384,95%0
PCP-PEV2532,33%0
L2442,24%0

Municipal assembly

Registered
17.909
Voters
10.879 (60,75%)
Seats
21
ListVotes%Seats
PPD/PSD.CDS-PP5.76452,98%13
PS3.41531,39%7
VP5845,37%1
PCP-PEV3162,90%0
L3142,89%0

Source: SGMAI — resultados oficiais das Autárquicas 2025. Official results; only the list that elects the council president is marked (the person’s name is not in these results).

Contacts

Mayor
Luís Filipe Santana Dias
Address
Praça da República, 2040-320 RIO MAIOR
Telephone
243999300
Email
geral@cm-riomaior.pt
Website
www.cm-riomaior.pt

Source: DGAL — Portal Autárquico, Lista de Presidentes e contactos dos Municípios (atualizada 04/09/2026).

On the web

Q941958 · Wikipedia · www.cm-riomaior.pt/

Source: Wikidata (CC0).

Neighbouring municipalities

Alcobaça (26,0 km) · Azambuja (21,7 km) · Cadaval (17,7 km) · Caldas da Rainha (18,3 km) · Porto de Mós (26,5 km) · Santarém (14,8 km)

Straight-line distance to the centroid of the district/region of Santarém: 35,3 km.

Source: DGT, CAOP2025 (CC BY 4.0) — adjacência de limites; distância em linha reta entre centróides (licence CC BY 4.0).

Location in the district

Population (inh.)
  • 3.513 – 6.975
  • 7.016 – 12.472
  • 17.355 – 21.607
  • 22.012 – 34.111
  • 34.329 – 58.662
Density (inh./km²)
  • 11,4 – 41,0
  • 47,3 – 64,0
  • 73,1 – 98,0
  • 99,1 – 106,9
  • 126,3 – 1.466,9
Area (km²)
  • 13,7 – 92,2
  • 95,4 – 190,4
  • 222,1 – 272,8
  • 351,2 – 521,4
  • 552,5 – 1.115,7
Quantile classes · current municipality
Rio Maior highlighted. Click a neighbouring municipality to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

Compare Rio Maior with other municipalities… · Compare parishes…

Other municipalities of the district of Santarém

Abrantes · Alcanena · Almeirim · Alpiarça · Benavente · Cartaxo · Chamusca · Constância · Coruche · Entroncamento · Ferreira do Zêzere · Golegã · Mação · Ourém · Salvaterra de Magos · Santarém · Sardoal · Tomar · Torres Novas · Vila Nova da Barquinha

Sources: INE, 2021 Census (resident population) · DGT, CAOP2025 (area and parishes) · more details · Data updated on 24/09/2026