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Population & demographics
All demographic data for Treia: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Treia.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Treia.
Treia is a medium-sized municipality in the province of Macerata, Marche region. With a population of 9002 inhabitants and a density of 96 per km², it covers an area of 93,5 km². The average declared income is 22.616 €.
Treia in numbers: the analysis
Among the 55 municipalities of the province of Macerata, Treia ranks 12 by population.
The census record tells a story of long decline: in 1951 Treia had 11,315 inhabitants; today (2026) it has 9,002 — 20.4% fewer.
The generational balance is in line with the norm: the ageing index of Treia is 239 (over-65s per 100 under-14s).
Demographic projections to 2050 estimate about 8,096 inhabitants for Treia: an expected decline of 10.1% from today.
The average municipality in the province of Macerata has about 5,485 residents: Treia has 1.6 times as many.
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: 1368
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Treia population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/treia-043054" title="Population pyramid of Treia — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/treia-043054" alt="Population pyramid of Treia — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>