Kosmaczewo postal code
Village · sierpecki county (powiat) · Zawidz municipality (gmina) · mazowieckie voivodeship
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The postal code for Kosmaczewo is 09-209.
Postal code – Kosmaczewo
How to address a letter or parcel in Poland?
Jan Kowalski Kosmaczewo 15 09-209 Kosmaczewo
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 Kosmaczewo, so the second line contains the locality name and property number (e.g. Kosmaczewo 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 Kosmaczewo if it has no named streets?
Instead of a street, write the locality name and house number, e.g. “Kosmaczewo 15”. On the last line, write the postal code 09-209 and the locality or post office name.
What is the postal code for Kosmaczewo?
The postal code for Kosmaczewo is 09-209.
Which voivodeship and county is Kosmaczewo in?
Kosmaczewo (village) is in sierpecki county (powiat), Zawidz municipality (gmina), mazowieckie voivodeship.
Which localities are closest to Kosmaczewo?
The closest localities to Kosmaczewo are: Nowe Kowalewo (1 km), Petrykozy (1.5 km), Słupia (1.6 km), Mańkowo (2.1 km), Wilkęsy (2.3 km), Kowalewo (2.3 km). Distances are measured in a straight line between locality centres.
Localities near Kosmaczewo (sierpecki county)
Which county and municipality does Kosmaczewo belong to?
Kosmaczewo lies in Zawidz municipality (gmina), in sierpecki county (powiat), mazowieckie voivodeship, Poland. Centre of the area based on address points: 52.7593, 19.8805.
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