| Paindu Union | |
| Native Name: | পাইন্দু ইউনিয়ন |
| Native Name Lang: | bn |
| Pushpin Map: | Bangladesh |
| Subdivision Type: | Country |
| Subdivision Name: | Bangladesh |
| Subdivision Type1: | Division |
| Subdivision Name1: | Chittagong Division |
| Subdivision Type2: | District |
| Subdivision Name2: | Bandarban District |
| Subdivision Type3: | Upazila |
| Subdivision Name3: | Ruma Upazila |
| Government Type: | Union Council |
| Leader Title: | Chairman |
| Population Density Km2: | auto |
| Timezone: | BST |
| Utc Offset: | +6 |
Paindu Union (bn|পাইন্দু ইউনিয়ন) is a Union of Ruma Upazila in Bandarban District, Chittagong Division, Bangladesh.[1] Its population is 2,965 men and 2,838 women, and the Union's literacy rate is 21 per cent.
According to 2022 census, total population of Paindu union is 5,968. Among them, 3,842 are Christian, 2,050 are Buddhist, 74 are Muslim and 2 are Hindu.