| Official Name: | Mae On |
| Native Name: | แม่ออน |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chiang Mai |
| Subdivision Type2: | Seat |
| Subdivision Name2: | On Klang |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Established Date: | 1994 |
| Population Total: | 21315 |
| Population As Of: | 2018 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 50130 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 5023 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 18.7764°N 99.2481°W |
Mae On (Thai: แม่ออน, in Thai pronounced as /mɛ̂ː ʔɔ̄ːn/) is a district (amphoe) of Chiang Mai province in the north of Thailand.
The district is about 40 km east of the city of Chiang Mai. Neighboring districts are (from the west clockwise) San Kamphaeng and Doi Saket of Chiang Mai Province; Mueang Pan and Mueang Lampang of Lampang province, Ban Thi, Mueang Lamphun and Mae Tha of Lamphun province.
Mae Ta Krai National Park protects the source of the On River (น้ำแม่ออน), a tributary of the Ping River that gives its name to the district.
Mae On is a popular destination for rock climbers who wish to climb the limestone cliffs of "Crazy Horse Buttress" in the Khun Tan Range. Rock climbing at Crazy Horse has greatly expanded since 2000 due to the work of Joshua Morris and Khaetthaleeya Uppakham while writing their book, A Guide to Rock Climbing in Northern Thailand.[1] [2] Other tourist attractions of the town include natural hot springs and the Mae On cave system.
The minor district (king amphoe) was created on 30 April 1994, when six tambons were split off from San Kamphaeng district.[3]
On 15 May 2007, all 81 minor districts were upgraded to full districts.[4] On 24 August the upgrade became official.[5]
The district Mae On is subdivided into 6 subdistricts (Tambon), which are further subdivided into 49 administrative villages (Muban).
| No. | Name | Thai | Villages | Pop.[6] | |
|---|---|---|---|---|---|
| 1. | On Nuea | Thai: ออนเหนือ | 10 | 3,297 | |
| 2. | On Klang | Thai: ออนกลาง | 11 | 4,875 | |
| 3. | Ban Sahakon | Thai: บ้านสหกรณ์ | 8 | 3,365 | |
| 4. | Huai Kaeo | Thai: ห้วยแก้ว | 8 | 2,819 | |
| 5. | Mae Tha | Thai: แม่ทา | 7 | 4,514 | |
| 6. | Tha Nuea | Thai: ทาเหนือ | 5 | 2,445 |
There are 6 subdistrict administrative organizations (SAO) in the district: