Niwkowo postal code
Village · łomżyński county (powiat) · Wizna municipality (gmina) · podlaskie voivodeship
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The postal code for Niwkowo is 18-430.
Postal code – Niwkowo
How to address a letter or parcel in Poland?
Jan Kowalski Niwkowo 15 18-430 Niwkowo
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 Niwkowo, so the second line contains the locality name and property number (e.g. Niwkowo 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 Niwkowo if it has no named streets?
Instead of a street, write the locality name and house number, e.g. “Niwkowo 15”. On the last line, write the postal code 18-430 and the locality or post office name.
What is the postal code for Niwkowo?
The postal code for Niwkowo is 18-430.
Which voivodeship and county is Niwkowo in?
Niwkowo (village) is in łomżyński county (powiat), Wizna municipality (gmina), podlaskie voivodeship.
Which localities are closest to Niwkowo?
The closest localities to Niwkowo are: Lisno (2 km), Bronowo (3.2 km), Grądy-Woniecko (3.3 km), Kramkowo (3.5 km), Janczewo (4.1 km), Wizna (4.5 km). Distances are measured in a straight line between locality centres.
Localities near Niwkowo (łomżyński county)
Which county and municipality does Niwkowo belong to?
Niwkowo lies in Wizna municipality (gmina), in łomżyński county (powiat), podlaskie voivodeship, Poland. Centre of the area based on address points: 53.1553, 22.3583.
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