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Population & demographics
All demographic data for Terzigno: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Terzigno.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Terzigno.
Terzigno is a medium-sized municipality in the province of Napoli, Campania region. With a population of 17.373 inhabitants and a density of 735 per km², it covers an area of 23.6 km². The average declared income is 16.238 €.
Terzigno in numbers: the analysis
Terzigno has grown substantially since 1951: from 8,541 inhabitants then to 17,373 in 2026, an increase of 103.4%.
The generational balance is in line with the norm: the ageing index of Terzigno is 125 (over-65s per 100 under-14s).
Demographic projections to 2050 estimate about 15,379 inhabitants for Terzigno: an expected decline of 11.5% from today.
Compared with the provincial average of Napoli (about 32,118 residents per municipality), Terzigno is a markedly smaller centre.
Among the 92 municipalities of the province of Napoli, Terzigno ranks 43 by population.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 18.002 |
| 2020 | 17.811 |
| 2021 | 17.482 |
| 2022 | 17.256 |
| 2023 | 17.318 |
| 2024 | 17.298 |
| 2025 | 17.260 |
| 2026 | 17.373 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 8802 | 50.7% |
| Women | 8571 | 49.3% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 143 |
| 2022 | 153 |
| 2023 | 124 |
| 2024 | 120 |
| 2025 | 141 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 8541 |
| 1961 | 10.160 |
| 1971 | 10.947 |
| 1981 | 10.915 |
| 1991 | 13.653 |
| 2001 | 15.870 |
| 2011 | 17.367 |
| 2019 | 18.002 |
| 2020 | 17.811 |
| 2021 | 17.482 |
| 2022 | 17.256 |
| 2023 | 17.318 |
| 2024 | 17.298 |
| 2025 | 17.260 |
| 2026 | 17.373 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 16.240 | 47.0% |
| Married | 16.170 | 46.8% |
| Divorced | 348 | 1.0% |
| Widowed | 1762 | 5.1% |
School-Age Population (2026)
Total 0-18 years: 3269
| Valore | |
|---|---|
| Nido (0-2) | 396 |
| Infanzia (3-5) | 443 |
| Primaria (6-10) | 853 |
| Medie (11-13) | 537 |
| Superiori (14-18) | 1040 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Terzigno population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/terzigno-063082" title="Population pyramid of Terzigno — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/terzigno-063082" alt="Population pyramid of Terzigno — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>