Olszewo postal code
Village · żuromiński county (powiat) · Żuromin municipality (gmina) · mazowieckie voivodeship
- code
- 1
- streets
- 5
The postal code for Olszewo is 09-300. The code covers 5 streets.
Postal code – Olszewo
Streets A–Z (5)
How to address a letter or parcel in Poland?
Jan Kowalski ul. Krótka 1 09-300 Olszewo
Write the postal code in the 00-000 format on the last line, before the town name. Put the recipient's full name on the first line and the street with building and flat number on the second. For mail from abroad, add POLAND as the final line.
Frequently asked questions
What is the postal code for Olszewo?
The postal code for Olszewo is 09-300.
Which voivodeship and county is Olszewo in?
Olszewo (village) is in żuromiński county (powiat), Żuromin municipality (gmina), mazowieckie voivodeship.
Are there other localities named Olszewo?
Yes – 13 localities share this name, including in these voivodeships: warmińsko-mazurskie, podlaskie, wielkopolskie, łódzkie. Each has its own postal code.
Which localities are closest to Olszewo?
The closest localities to Olszewo are: Kosewo (2.4 km), Chamsk (2.8 km), Sadowo (2.9 km), Franciszkowo (2.9 km), Dębsk (2.9 km), Cierpigórz (3.2 km). Distances are measured in a straight line between locality centres.
Localities near Olszewo (żuromiński county)
Which county and municipality does Olszewo belong to?
Olszewo lies in Żuromin municipality (gmina), in żuromiński county (powiat), mazowieckie voivodeship, Poland. Centre of the area based on address points: 53.0418, 19.9561.
Where does this data come from?
Localities and postal codes come from the public TERYT registers (Statistics Poland), while streets, building numbers and locations come from the National Register of Boundaries (GUGiK). Data as of 12.11.2026. This site is not affiliated with Poczta Polska; for important shipments, confirm the code at a post office. More about sources