Siwki postal code
Village · kolneński county (powiat) · Grabowo municipality (gmina) · podlaskie voivodeship
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The postal code for Siwki is 18-507.
Postal code – Siwki
How to address a letter or parcel in Poland?
Jan Kowalski Siwki 15 18-507 Siwki
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 Siwki, so the second line contains the locality name and property number (e.g. Siwki 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 Siwki if it has no named streets?
Instead of a street, write the locality name and house number, e.g. “Siwki 15”. On the last line, write the postal code 18-507 and the locality or post office name.
What is the postal code for Siwki?
The postal code for Siwki is 18-507.
Which voivodeship and county is Siwki in?
Siwki (village) is in kolneński county (powiat), Grabowo municipality (gmina), podlaskie voivodeship.
Which localities are closest to Siwki?
The closest localities to Siwki are: Gnatowo (1.5 km), Kurkowo (2.1 km), Niebrzydy (2.3 km), Szymany (2.3 km), Nieciki (2.4 km), Rosochate (3.2 km). Distances are measured in a straight line between locality centres.
Localities near Siwki (kolneński county)
Which county and municipality does Siwki belong to?
Siwki lies in Grabowo municipality (gmina), in kolneński county (powiat), podlaskie voivodeship, Poland. Centre of the area based on address points: 53.4374, 22.2466.
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