Regional Statistics
Population in Sępoleński County 2018
In 2018, Sępoleński county ranked 341 of 380 Polish counties. Population shrank by 489 residents -1.17% between 2013-2018, at 41,147.
Among 339 declining counties, in the bottom 40% for rate of decline. Within Kuyavian-Pomeranian voivodeship, ranked 21 of 23 counties.
Based on 31 years of official GUS statistics for Sępoleński county and its 4 municipalities within Kuyavian-Pomeranian voivodeship.
Popular Cities in Poland
You may also be interested in
Contact Information for Sępoleński
Updated 52 days ago
Top tools
NIP Generator
Generate valid Polish NIP (VAT / tax ID) numbers with correct checksums for software testing.
Mikrorachunek Checker
Check whether a mikrorachunek podatkowy number matches the official format and extract the embedded PESEL or NIP.
Polish IBAN Generator
Generate a valid Polish IBAN from a bank code and account number. See the 28-character PL IBAN format with a real example.
Top articles
How to Pay Tax After Buying a Car in Poland
Step-by-step guide to paying PCC tax after buying a used car in Poland. Covers the 2% rate, 14-day deadline, PCC-3 form, and online payment.
9 min readHow to Get Polish Citizenship by Descent
How to get Polish citizenship by descent. Eligibility rules, required documents, application steps, costs, and timelines for ancestry-based claims.
10 min readWhich Taxes Are Paid Through a Mikrorachunek in Poland?
PIT, CIT, and VAT go through your mikrorachunek. PCC, property tax, and local fees do not. Here is the full breakdown for taxpayers in Poland.
7 min readLet's build Poland.gg together
Join our Discord community. Get early access, shape the roadmap, and connect with data people across Poland.
Dashboard and business tools go public in 2027 — early supporters access them first and keep their discount on everything.
Get up to 90% off — forever
The longer you stay, the less you pay. 9% off per month, stacking up to 90%. The 100 longest supporters get free access for life.
© 2026 Poland.gg