| Bhayna Union | |
| Native Name: | ভায়না ইউনিয়ন |
| Settlement Type: | Union |
| Pushpin Map: | Bangladesh |
| Pushpin Map Alt: | Location in Bangladesh |
| Pushpin Label Position: | Right |
| Subdivision Type: | Country |
| Subdivision Name: | Bangladesh |
| Subdivision Type1: | Division |
| Subdivision Name1: | Khulna |
| Subdivision Type2: | District |
| Subdivision Name2: | Jhenaidah |
| Subdivision Type3: | Upazila |
| Subdivision Name3: | Harinakunda |
| Established Title: | Established |
| Unit Pref: | Metric |
| Area Total Km2: | 38.07 |
| Population As Of: | 2011 |
| Population Total: | 25,813 |
| Population Density Km2: | auto |
| Timezone1: | BST |
| Utc Offset1: | +6 |
| Official Name: | Bhayna Union |
Bhayna Union (Bengali: ভায়না ইউনিয়ন) is a union parishad situated at Harinakunda Upazila, in Jhenaidah District, Khulna Division of Bangladesh.[1] The union has an area of and as of 2001 had a population of 25,813.[2] There are 11 villages and 6 mouzas in the union.