Castrillo de Onielo, Palencia property and area FAQs

Castrillo de Onielo is a municipality located in the province of Palencia, Castile and León, Spain.

The current IGN Nomenclátor extract records 1 official population nucleus for Castrillo de Onielo. The imported source records are dated through 2025-10-21. The entry explicitly marked as the municipal capital is Castrillo de Onielo, at a recorded elevation of approximately 822 metres. Nomenclátor entries describe settlement geography; they are not listing totals, neighbourhood boundaries or evidence of homes currently available for sale.

The linked structured municipality record gives an area of 40.3 square kilometres for Castrillo de Onielo municipality. This is municipal geography, not a property-search radius.

The sourced municipality record gives a reference elevation of approximately 825 metres. Elevation can vary within the municipality and is not a property-specific measurement.

The current IGN Nomenclátor extract records 1 official population nucleus for Castrillo de Onielo municipality. These are settlement records, not property listings.

Castrillo de Onielo is an official municipality in Palencia province, Spain. Its exact municipality identity is used for the official evidence on this page.

NLS resolves the municipality context through INE code 34051 and keeps the province label Palencia. Name-only fuzzy matching is not used to assign official market values.

Dividing the INE population of 91 by the recorded municipal area of 40.3 km² gives approximately 2.3 residents per km² for Castrillo de Onielo municipality. This is a transparent calculation from the two cited values.

The latest imported INE population for Castrillo de Onielo municipality is 91, for period 2023.

Across the first and latest points in the displayed INE series for Castrillo de Onielo municipality, recorded population changed by -28.9%. This describes the published series, not a forecast.

The latest imported INE household-income atlas value for Castrillo de Onielo municipality is €16,148 net income per person, for period 2023.

INE records an average age of 54.8 years for Castrillo de Onielo municipality, for period 2023.

The page uses 7 published observations for Castrillo de Onielo municipality, running from 2015 to 2023.

The population figure uses INE period 2023. The page shows the period beside the value so it is not mistaken for a live counter.

From 2015 to 2023, the displayed population value for Castrillo de Onielo municipality changed by -28.9%. This is a historical comparison between two published points, not a forecast.

Registradores reports a foreign-buyer share of 5.8% for Castilla y León in 2026Q2. It is regional context, not a municipality estimate.

The displayed series for Castilla y León begins at 3.6% in 2024Q3. This is the earliest point in the current imported series, not an estimate for an earlier period.

Within the 8 displayed observations for Castilla y León, the highest regional foreign-buyer share value is 5.8% in 2026Q2.

Within the same displayed series for Castilla y León, the lowest regional foreign-buyer share value is 3.6% in 2024Q3.

From 2024Q3 to 2026Q2, the displayed registered sale-price benchmark value for Palencia province changed by 14.0%. This is a historical comparison between two published points, not a forecast.

From 2024Q3 to 2026Q2, the displayed regional foreign-buyer share value for Castilla y León changed by 59.2%. This is a historical comparison between two published points, not a forecast.

Within the 8 displayed observations for Castilla y León, the highest regional house-price index value is 113.6 index points in 2026Q2.

Dirección General del Catastro records 335 buildings for Castrillo de Onielo municipality in the current imported extract. This is physical stock, not homes for sale.

The current Catastro building extract records 151 dwellings for Castrillo de Onielo municipality. It should not be read as current sale inventory.

Across buildings with a recorded construction year, the Catastro extract gives an average year of 1,937 for Castrillo de Onielo municipality. Missing construction years are not imputed.

The current official administrative extract contains 7 energy certificates for Castrillo de Onielo municipality. Certificate count is registered coverage, not the total number of homes.

The largest recorded Catastro age band is Before 1950, with 241 buildings, or 72.4% of buildings that enter the displayed age distribution.

The 1970–1989 band contains 49 recorded buildings for Castrillo de Onielo municipality, representing 14.7% of the buildings included in the displayed age distribution.

Among the imported certificates for Castrillo de Onielo municipality, 0.0% are rated A, B or C. The share applies only to registered certificates in the dataset.

The current eligible public inventory contains 0 listings for Castrillo de Onielo. The count excludes sold, withdrawn, expired, rejected, draft, private, off-market and feed-private records.