| En Name: | Marmyzhi |
| Ru Name: | Мармыжи |
| Coordinates: | 51.805°N 35.4917°W |
| Map Label Position: | right |
| Federal Subject: | Kursk Oblast |
| Adm District Jur: | Kurchatovsky District |
| Adm Selsoviet Type: | Selsoviet |
| Adm Selsoviet Jur: | Kosteltsevsky |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun District Jur: | Kurchatovsky Municipal District |
| Mun District Jur Ref: | [1] |
| Rural Settlement Jur: | Kosteltsevsky Selsoviet Rural Settlement |
| Pop 2010Census: | 115 |
| Established Title: | First mentioned |
| Postal Codes: | 307222 |
| Postal Codes Ref: | [2] |
| Dialing Codes: | 47131 |
| Website: | http://костельцевский-сельсовет.рф |
Marmyzhi (ru|links=no|Мармыжи) is a rural locality in Kosteltsevsky Selsoviet Rural Settlement, Kurchatovsky District, Kursk Oblast, Russia. Population:
The village is located on the Prutishche River in the basin of the Seym, 69 km from the Russia–Ukraine border, 49 km north-west of Kursk, 20 km north-west of the district center – the town Kurchatov, 5 km from the selsoviet center – Kosteltsevo.[3]
Marmyzhi is located 36.5 km from the federal route Crimea Highway, 20 km from the road of regional importance (Kursk – Lgov – Rylsk – border with Ukraine), 13.5 km from the road (Lgov – Konyshyovka), on the road of intermunicipal significance (38K-023 – Olshanka – Marmyzhi – 38K-017),[4] 13,5 km from the nearest railway halt 565 km[5] (railway line Navlya – Lgov-Kiyevsky).
The rural locality is situated 55 km from Kursk Vostochny Airport, 149 km from Belgorod International Airport and 258 km from Voronezh Peter the Great Airport.