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Isna

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Parish of the municipality of Oleiros (Oleiros), district of Castelo Branco.

Isna had 151 residents in the 2021 Census, 65,6% of whom were aged 65 or over, and 8,1% of the population aged 15 or over had completed higher education. It borders 4 parishes and its centroid is 11,3 km in a straight line from the centroid of the municipality of Oleiros.

Population (inh.)
  • 140 – 151
  • 154 – 167
  • 226 – 254
  • 260 – 638
  • 834 – 2.080
Density (inh./km²)
  • 5,2 – 5,4
  • 5,4 – 5,7
  • 7,3 – 7,7
  • 8,9 – 14,5
  • 14,7 – 19,2
Area (km²)
  • 17,7 – 19,2
  • 26,9 – 27,9
  • 29,4 – 31,0
  • 33,3 – 48,5
  • 93,5 – 143,6
Quantile classes · current parish
Parish highlighted. Click a neighbouring parish to open its page. Geometry: CAOP2025, Direção-Geral do Território (simplified).

The 10 parishes of Oleiros

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

#ParishPopulationArea (km²)Inhab./km²
1Cambas25448,545,2
2Estreito-Vilar Barroco83493,518,9
3Isna15127,945,4
4Madeirã15426,875,7
5Mosteiro26017,7014,7
6Oleiros-Amieira2.080143,6414,5
7Orvalho63833,3119,2
8Sarnadas de São Simão16731,005,4
9Sobral14019,167,3
10Álvaro22629,417,7
Code (DTMNFR)
050605
Resident population (2021)
151
Area
27,94 km²
Density
5,4 inh./km²
Share of the municipality (population)
3,1%
Rank in the municipality (population)
9th of 10

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
74 (49,0%)
Women
77 (51,0%)
Portuguese nationality
150 (99,3%)
Foreign nationality
1 (0,7%)
Ageing index
3.300,0 elderly per 100 young people
Private households
74
Average household size *
2,04 people
Dwellings
155
Classic family dwellings
155
Buildings
155
Buildings with 7 or more floors
0
With higher education (15+)
8,1% (12)
Unemployment rate *
0,00% (H 0,00% · M 0,00%)
Active / employed population
34 / 34

Population by age group

Population by age group0-14 years: 3 (2,0%); 15-24 years: 2 (1,3%); 25-64 years: 47 (31,1%); 65+ years: 99 (65,6%)0-143 · 2,0%15-242 · 1,3%25-6447 · 31,1%65+99 · 65,6%
Residents by age group and share of the total (151).
Age groupTotalMenWomen
0-14 years321
15-24 years211
25-64 years472522
65+ years994653

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 Sobreira Formosa e Alvito da Beira (Proença-a-Nova) · Oleiros-Amieira · União das freguesias de Proença-a-Nova e Peral (Proença-a-Nova) · União das freguesias de Ermida e Figueiredo (Sertã)

Straight-line distance to the centroid of the municipality of Oleiros
11,3 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
151
Voters
133
Turnout
88,08% (2021: 86,50%)
Seats
7
ListVotes%Seats
PPD/PSD
Partido Social Democrata		11787,97%7
Blank votes86,02%
Null votes86,02%

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

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
Rua S. Dionísio, N.º 6
Isna (OLEIROS)
6160-152 ISNA
Telephone
274822133
Email
freguesiadeisna@gmail.com

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

More information

Coordinates
39,84250, -7,86028
Wikipedia
Isna
Wikidata
Q1013115

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