| 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 (in Slovenian pronounced as /ˈkoːpəɾ/; Slovenian: Mestna občina Koper, Italian: Comune città di Capodistria) is one of twelve urban municipalities of Slovenia. It lies at the coastline of the Adriatic Sea in southwestern Slovenia and was established in 1994. Its seat is the town of Koper. The area has been included in Coastal–Karst Statistical Region since 1995. The municipality is bilingual (Slovene and Italian). It borders Italy & Croatia.
In addition to the municipal seat of Koper, the municipality also includes the following settlements: