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The loudest cities in Portugal, ranked by noise exposure
5 Portugal cities make the measured EEA ranking. Odivelas leads with exposed-resident Lden of 45–65 dB, while half the country's ranked cities fall at or below Lden 55 dB.
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| Portugal # | City | Europe # | Lden | Lnight | Source | Population |
|---|---|---|---|---|---|---|
| 1 | Odivelas | 286 | 45–65 | 40–55 | Road | 148,058 |
| 2 | Porto | 292 | 45–70 | 40–60 | Road | 237,593 |
| 3 | Amadora | 299 | 45–65 | 40–55 | Road | 171,500 |
| 4 | Oeiras | 304 | 45–65 | 40–60 | Road | 171,767 |
| 5 | Matosinhos | 313 | 45–60 | 40–55 | Road, Air | 172,586 |
Portugal's 5 ranked cities are home to 901,504 residents. By exposed-resident Lden the field reads Odivelas (45–65 dB), Porto (45–70 dB), Amadora (45–65 dB), Oeiras (45–65 dB), Matosinhos (45–60 dB), ending at Matosinhos (45–60 dB). The median lands near Lden 55 dB. Road traffic is the dominant source in all 5. The most populous, Porto at 237,593 residents, ranks #292 across Europe with exposed-resident Lden of 45–70 dB. The WHO road-traffic guideline is 53 dB Lden by day and 45 dB Lnight at night, which most of these Portugal cities exceed for their noise-exposed residents.
The figures come straight from the country's END strategic noise maps and the EEA's harmonised 2022 dataset — day-evening-night (Lden) exposure for the noise-affected population only. Lnight, the night-time figure, is the level most closely tied to sleep disturbance, which is why the EU reports it separately from the daytime Lden. Open any Portugal city below for its full figures, then measure your own street with the free live meter.
Which Portugal cities are the noisiest?
By this EEA data the noisiest Portugal cities are the same as the loudest, since "noisiest" here means measured road, rail, aircraft and industrial exposure: Odivelas, Porto, Amadora top the list, led by Odivelas at Lden 45–65 dB (road traffic). The full ranking is in the table above.
Portugal noise: the numbers
- 5 Portugal agglomerations are in the measured European ranking — 15th-most of any country here.
- Loudest: Odivelas at exposed-resident Lden 45–65 dB (European #286).
- Quietest ranked: Matosinhos at Lden 45–60 dB; median near Lden 55 dB.
- Road traffic is the dominant source in 5 of the 5.
- Combined population of the 5: 901,504.
How this ranking is measured
These are the same measurements behind the European ranking of all 314 cities — the EU Environmental Noise Directive strategic noise maps (road, rail, aircraft and industry), 2022 reporting round, harmonised by the European Environment Agency, with no estimation by us. Lden is the annual-average day-evening-night level; only residents above the 55 dB Lden threshold are reported, so the ranges describe the noise-exposed population.
How loud is your street?
Rankings describe city-wide exposure — your block is its own story. Check it with the free online decibel meter, or open any city above for its full figures.