| Urban Municipality of Koper | |
| Native Name: | Slovenian: Mestna občina Koper Italian: Comune città di Capodistria |
| Settlement Type: | Municipality |
| Coordinates: | 45.55°N 57°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Slovenia |
| Leader Title: | Mayor |
| Leader Name: | Aleš Bržan |
| Unit Pref: | Metric |
| Area Footnotes: | [1] |
| Area Total Km2: | 304 |
| Population Total: | 53,440 |
| Population As Of: | 2021 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +01 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +02 |
The Urban Municipality of Koper (pronounced as /sl/; sl|Mestna občina Koper, it|Comune città di Capodistria) is one of twelve urban municipalities of Slovenia. It is located at the coastline of the Adriatic Sea in southwestern Slovenia and was established in 1994. The seat of the municipality is the town of Koper. Since 1995, the area has been part of the Coastal–Karst Statistical Region. The municipality is bilingual, with both Slovene and Italian recognized, and it shares borders with Italy and Croatia.
In addition to the municipal seat of Koper, the municipality also includes the following settlements: