Entity data for San Marino's 9 municipalities (castelli). San Marino is the world's oldest republic (founded 301 AD).
| Source | URL | Data Used |
|---|---|---|
| Republic of San Marino | sanmarino.sm | Government structure, municipality names |
| Wikipedia - Subdivisions of San Marino | wikipedia.org | Administrative divisions (verification) |
| GADM (v4.1) | gadm.org | Administrative boundaries (municipalities) |