Osowa Łaszewska postal code
Village · żuromiński county (powiat) · Siemiątkowo municipality (gmina) · mazowieckie voivodeship
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The postal code for Osowa Łaszewska is 09-135.
Postal code – Osowa Łaszewska
How to address a letter or parcel in Poland?
Jan Kowalski Osowa Łaszewska 15 09-135 Osowa Łaszewska
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. There are no named streets in Osowa Łaszewska, so the second line contains the locality name and property number (e.g. Osowa Łaszewska 15). If the serving post office is in another locality, its name can appear next to the code on the last line.
Frequently asked questions
How do I address a letter to Osowa Łaszewska if it has no named streets?
Instead of a street, write the locality name and house number, e.g. “Osowa Łaszewska 15”. On the last line, write the postal code 09-135 and the locality or post office name.
What is the postal code for Osowa Łaszewska?
The postal code for Osowa Łaszewska is 09-135.
Which voivodeship and county is Osowa Łaszewska in?
Osowa Łaszewska (village) is in żuromiński county (powiat), Siemiątkowo municipality (gmina), mazowieckie voivodeship.
Which localities are closest to Osowa Łaszewska?
The closest localities to Osowa Łaszewska are: Julianowo (0.8 km), Wojciechowo (0.9 km), Osowa Drobińska (1.1 km), Osowa Krzeczanowska (1.8 km), Pijawnia (1.8 km), Chomęc (2.3 km). Distances are measured in a straight line between locality centres.
Localities near Osowa Łaszewska (żuromiński county)
Which county and municipality does Osowa Łaszewska belong to?
Osowa Łaszewska lies in Siemiątkowo municipality (gmina), in żuromiński county (powiat), mazowieckie voivodeship, Poland. Centre of the area based on address points: 52.8459, 20.0348.
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