| Plomodiern | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Plomodiern (Finistère).svg |
| Native Name: | Ploudiern |
| Coordinates: | 48.1819°N -4.2306°W |
| Elevation Min M: | 0 |
| Elevation Max M: | 249 |
| Insee: | 29172 |
| Postal Code: | 29550 |
| Arrondissement: | Châteaulin |
| Canton: | Crozon |
| Mayor: | Joël Blaize[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pleyben-Châteaulin-Porzay |
| Area Km2: | 46.74 |
Plomodiern (in French pronounced as /plɔmɔdjɛʁn/; Breton: Ploudiern) is a commune in the Finistère department of Brittany in north-western France.
Plomodiern has an oceanic climate (Köppen climate classification Cfb). The average annual temperature in Plomodiern is . The average annual rainfall is with December as the wettest month. The temperatures are highest on average in July, at around, and lowest in February, at around . The highest temperature ever recorded in Plomodiern was on 9 August 2003; the coldest temperature ever recorded was on 13 January 1987.
Inhabitants of Plomodiern are called in French Plomodiernois. The village is located next to the Menez Hom.
| 2001–2020 | Claude Bellin | |
| 2020–incumbent | Joël Blaize[2] |
2020:[3]