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Population & demographics
All demographic data for Nepi: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Nepi.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Nepi.
Nepi is a medium-sized municipality in the province of Viterbo, Lazio region. With a population of 9550 inhabitants and a density of 114 per km², it covers an area of 83,7 km². The average declared income is 21.874 €.
Nepi in numbers: the analysis
The average municipality in the province of Viterbo has about 5,130 residents: Nepi has 1.9 times as many.
By population, Nepi ranks no. 6 among the 60 municipalities of the province of Viterbo.
Nepi has grown substantially since 1951: from 4,450 inhabitants then to 9,550 in 2026, an increase of 114.6%.
The generational balance is in line with the norm: the ageing index of Nepi is 206 (over-65s per 100 under-14s).
Looking ahead to 2050, projections give Nepi about 11,888 inhabitants, up 24.5% from today.
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: 1463
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Nepi population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/nepi-056039" title="Population pyramid of Nepi — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/nepi-056039" alt="Population pyramid of Nepi — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>