Siwianka postal code
Village · otwocki county (powiat) · Kołbiel municipality (gmina) · mazowieckie voivodeship
- code
- 1
- streets
- 9
The postal code for Siwianka is 05-340. The code covers 9 streets.
Postal code – Siwianka
Streets A–Z (9)
How to address a letter or parcel in Poland?
Jan Kowalski ul. Doliny Świdra 1 05-340 Siwianka
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 Siwianka?
The postal code for Siwianka is 05-340.
Which voivodeship and county is Siwianka in?
Siwianka (village) is in otwocki county (powiat), Kołbiel municipality (gmina), mazowieckie voivodeship.
Which localities are closest to Siwianka?
The closest localities to Siwianka are: Kruszówiec (1.1 km), Dobrzyniec (1.5 km), Bolesławów (1.6 km), Czarnówka (2.1 km), Ostrowik (2.5 km), Ostrów (2.9 km). Distances are measured in a straight line between locality centres.
Localities near Siwianka (otwocki county)
Which county and municipality does Siwianka belong to?
Siwianka lies in Kołbiel municipality (gmina), in otwocki county (powiat), mazowieckie voivodeship, Poland. Centre of the area based on address points: 52.1087, 21.4362.
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