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Population & demographics
All demographic data for Alatri: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Alatri.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Alatri.
Alatri is a medium-sized municipality in the province of Frosinone, Lazio region. With a population of 27.436 inhabitants and a density of 283 per km², it covers an area of 97 km². The average declared income is 21.098 €.
Alatri in numbers: the analysis
Few municipalities in Lazio are larger: it ranks no. 28 by population out of 378.
The average municipality in the province of Frosinone has about 5,058 residents: Alatri has 5.4 times as many.
Demographic projections to 2050 estimate about 26,056 inhabitants for Alatri: an expected decline of 5% from today.
The generational balance is in line with the norm: the ageing index of Alatri is 199 (over-65s per 100 under-14s).
Alatri has grown substantially since 1951: from 20,459 inhabitants then to 27,436 in 2026, an increase of 34.1%.
By population, Alatri ranks no. 3 among the 91 municipalities of the province of Frosinone.
Population Trend
Male/Female Ratio
Demographic Statistics
Demographic Indices
Births (recent years)
Historical Population (1951-present)
Marital Status (2025)
School-Age Population (2026)
Total 0-18 years: 4424
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Alatri population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/alatri-060003" title="Population pyramid of Alatri — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/alatri-060003" alt="Population pyramid of Alatri — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>