| Arun Gaunpalika | |
| Native Name: | अरुण गाउँपालिका |
| Settlement Type: | Rural Municipality |
| Pushpin Map: | Nepal Province1#Nepal |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Province No. 1 |
| Coordinates: | 27.21°N 87.16°W |
| Subdivision Name: |  Nepal |
| Subdivision Type1: | Province |
| Subdivision Name1: | Province No. 1 |
| Subdivision Type2: | District |
| Subdivision Name2: | Bhojpur |
| Subdivision Type3: | Wards |
| Subdivision Name3: | 7 |
| Government Type: | Village Council |
| Leader Title: | Chairperson |
| Leader Name: | Mr. Shalikram Khatry (NC) |
| Leader Title1: | Vice-chairperson |
| Leader Name1: | Mrs. Binita Dhakal (NC) |
| Established Title: | Established |
| Established Date: | 10 March 2017 |
| Seat Type: | Seat |
| Seat: | Pyauli |
| Area Total Km2: | 154.76 |
| Population As Of: | 2011 |
| Population Total: | 17687 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Timezone: | Nepal Standard Time |
| Utc Offset: | +5:45 |
| Postal Code Type: | Postal Code |
| Website: | official website |
Arun (Nepali: अरुण) is one of seven rural municipalities (गाउँपालिका) of Bhojpur District of Province No. 1 of Nepal. There are a total of 9 municipalities in Bhojpur of which 2 are urban and 7 are rural.
According to MoFALD Arun has an area of 154.76km2 and the total population of the municipality is 17, 687 as of Census of Nepal 2011.[1] [2] Champe, Yangpang, Pyauli, Charambi, Jarayotar and Yaku VDCs were merged to form Arun Rural Municipality.[1] Pyauli is the Headquarter of this newly formed rural municipality.