Trosa
- 📍 Location: Södermanland County,
35 km north-east of Nyköping - 🌍 Region: Svealand
- 👥 Population: 14,900 (Dec 31, 2025)
- 🏙️ Largest towns: Trosa, Vagnhärad, Sund
- 📐 Area: 210 km² (land area)
- 🚗 To Stockholm: about 56 km in a straight line
- ⏰ Time zone: CET (UTC +1, DST CEST +2)
- 💰 Currency: Swedish krona (SEK)
Answers to frequently asked questions
What is the population of Trosa Municipality?
Trosa Municipality had 14,900 residents on December 31, 2025, up 591 (4.1%) from December 31, 2020 (Statistics Sweden).
Which county is Trosa Municipality in?
Trosa Municipality is in Södermanland County, in the Svealand region of Sweden. The county has 9 municipalities and its seat is Nyköping.
What are the largest towns in Trosa Municipality?
The largest urban area is Trosa with 7,540 residents, followed by Vagnhärad (4,109), Sund (415), Stensund (400) and Västerljung (378). In total the municipality has 6 urban areas (Statistics Sweden, 2023).
How far is Trosa from Nyköping?
Trosa is about 35 km from the county seat Nyköping in a straight line; Nyköping lies to the south-west of Trosa. The distance by road is longer.
How far is Trosa from Stockholm?
Trosa is about 56 km from Stockholm in a straight line. The distance by road is longer.
How large is Trosa Municipality?
The land area of Trosa Municipality is 210 km² (Statistics Sweden, 2025). Population density is 71 residents per km².
What is Trosa Municipality known for?
Trosa Municipality is known for the small town of Trosa at the mouth of the Trosa River, nicknamed the World's End, with town privileges from 1454. Its harbour and archipelago draw many boaters and summer visitors, and the population grows sharply in summer.