| Atchuelinguk River | |
| Map Size: | 300 |
| Pushpin Map: | USA Alaska |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the mouth of the Atchuelinguk River in Alaska |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Alaska |
| Subdivision Type4: | Census Area |
| Subdivision Name4: | Kusilvak |
| Length: | 266km (165miles) |
| Discharge1 Location: | Pilot Station (near mouth) |
| Discharge1 Avg: | 73.807m3/s[1] |
| Source1: | Nulato Hills |
| Source1 Location: | Yukon Delta National Wildlife Refuge |
| Source1 Coordinates: | 63.0439°N -161.4439°W |
| Source1 Elevation: | 2006feet[2] |
| Mouth: | Yukon River |
| Mouth Location: | 25miles west of Marshall |
| Mouth Coordinates: | 61.9583°N -162.8272°W[3] |
| Mouth Elevation: | 0feet |
| Basin Size: | 4201.6km2[4] |
The Atchuelinguk River (Yup'ik Ecuilnguq, literally "clear water"[5])Atchuelinguk is a 165miles tributary of the Yukon River in the U.S. state of Alaska.[3] It flows southwest from the Nulato Hills through the Yukon Delta National Wildlife Refuge to meet the larger river near Pilot Station.[6]