Nordrhein-Westfalen is a federated state of Germany.
Boundaries: Federal Agency for Cartography and Geodesy, Datenlizenz Deutschland – Namensnennung – Version 2.0 (www.govdata.de/dl-de/by-2-0), https://gdz.bkg.bund.de/index.php/default/digitale-geodaten/verwaltungsgebiete/nuts-gebiete-1-250-000-stand-31-12-nuts250-31-12.html; data modified. Boundaries via geoBoundaries gbOpen (https://www.geoboundaries.org).; Natural Earth (naturalearthdata.com), public domain
| Düsseldorf District | Düsseldorf | 5.2 M · 15 subdistricts |
| Regierungsbezirk Arnsberg | Arnsberg | 3.6 M · 12 subdistricts · seat ≠ largest |
| Regierungsbezirk Detmold | Detmold | 2.1 M · 7 subdistricts · seat ≠ largest |
| Regierungsbezirk Köln | Köln | 4.5 M · 11 subdistricts |
| Regierungsbezirk Münster | Münster | 2.7 M · 8 subdistricts |
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