| Official Name: | Mueang Lamphun |
| Native Name: | เมืองลำพูน |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Lamphun |
| Subdivision Type2: | Seat |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 140486 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 51000 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 5101 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 18.5781°N 99.0178°W |
Mueang Lamphun (Thai: เมืองลำพูน; in Thai pronounced as /mɯ̄aŋ lām.pʰūːn/) is the capital district (amphoe mueang) of Lamphun province, northern Thailand.
Neighboring districts are (from the south clockwise) Mae Tha and Pa Sang of Lamphun Province, San Pa Tong, Hang Dong, Saraphi of Chiang Mai province, Ban Thi of Lamphun and Mae On of Chiang Mai.
The main river of the district is the Ping River.
The district is divided into 17 sub-districts (tambons), which are further subdivided into 158 villages (mubans). The town (thesaban mueang) Lamphun covers tambon Nai Mueang. There are three more sub-district municipalities (thesaban tambons): Umong and Rim Ping cover the complete same-named tambons, and Ban Paen parts of tambons Ban Paen and Nong Nam. There are a further 12 tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Nai Mueang | ในเมือง | - | 14,068 | ||
| 2. | Mueang Nga | เหมืองง่า | 10 | 14,067 | ||
| 3. | Umong | อุโมงค์ | 11 | 13,558 | ||
| 4. | Nong Chang Khuen | หนองช้างคืน | 6 | 3,925 | ||
| 5. | Pratu Pa | ประตูป่า | 9 | 5,832 | ||
| 6. | Rim Ping | ริมปิง | 10 | 7,088 | ||
| 7. | Ton Thong | ต้นธง | 11 | 10,982 | ||
| 8. | Ban Paen | บ้านแป้น | 9 | 6,445 | ||
| 9. | Mueang Chi | เหมืองจี้ | 14 | 9,298 | ||
| 10. | Pa Sak | ป่าสัก | 18 | 11,797 | ||
| 11. | Wiang Yong | เวียงยอง | 8 | 6,096 | ||
| 12. | Ban Klang | บ้านกลาง | 12 | 8,195 | ||
| 13. | Makhuea Chae | มะเขือแจ้ | 20 | 15,249 | ||
| 16. | Si Bua Ban | ศรีบัวบาน | 12 | 9,010 | ||
| 17. | Nong Nam | หนองหนาม | 8 | 4,876 |