| Official Name: | Wiang Nong Long |
| Native Name: | เวียงหนองล่อง |
| Native Name Lang: | th |
| Settlement Type: | Amphoe |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Lamphun |
| Subdivision Type2: | Seat |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | Amphoe established |
| Population Total: | 17739 |
| Population As Of: | 2015 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 51120 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 5108 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 18.3933°N 98.7183°W |
Wiang Nong Long (Thai: เวียงหนองล่อง, in Thai pronounced as /wīa̯ŋ nɔ̌ːŋ lɔ̂ŋ/) is a district (amphoe) of Lamphun province, northern Thailand.
The minor district (king amphoe) was split off from Pa Sang district becoming effective on 1 April 1995.[1]
On 15 May 2007, all 81 minor districts were upgraded to full districts.[2] With publication in the Royal Gazette on 24 August, the upgrade became official.[3]
Neighboring districts are (from the east clockwise) Pa Sang and Ban Hong of Lamphun Province, Chom Thong and Doi Lo of Chiang Mai province.
The district Wiang Nong Long is divided into three sub-districts (tambon), which are further subdivided into 25 administrative villages (Muban).
| No. | Name | Thai | Villages | Pop.[4] | |
|---|---|---|---|---|---|
| 1. | Nong Long | Thai: หนองล่อง | 9 | 5,887 | |
| 2. | Nong Yuang | Thai: หนองยวง | 5 | 3,801 | |
| 3. | Wang Phang | Thai: วังผาง | 11 | 8,051 |
There are three sub-district municipalities (Thesaban Tambon) in the district: