| Hongahalli | |
| Other Name: | Krishnaraja Sagara |
| Settlement Type: | Town |
| Pushpin Map: | India Karnataka |
| Pushpin Label Position: | right |
| Pushpin Relief: | yes |
| Pushpin Map Caption: | Location in Karnataka, India |
| Coordinates: | 12.4073°N 76.5769°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Karnataka |
| Subdivision Type2: | District |
| Subdivision Name2: | Mandya |
| Named For: | Krishna Raja Sagara |
| Parts Type: | Talukas |
| Parts: | Shrirangapattana |
| Governing Body: | Grama Panchayath |
| Unit Pref: | Metric |
| Area Total Km2: | 6.13 |
| Elevation M: | 800 |
| Population Total: | 9047 [1] |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Kannada |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 571607 |
| Registration Plate: | KA-11 |
| Blank1 Name Sec1: | Nearest city |
| Blank2 Name Sec1: | Lok Sabha constituency |
| Blank2 Info Sec1: | Mandya Lok Sabha constituency |
| Blank3 Name Sec1: | Vidhan Sabha constituency |
| Blank3 Info Sec1: | Shrirangapattana Assembly constituency |
Hongahalli is a census town (as per Census 2011, its location code number is 614310) located at the southwestern border of Mandya district towards Mysuru district. It is famously known as Krishnaraja Sagara, due to KRS dam located here in this village. It is located about 20 kilometers northwest of Mysuru city in the Shrirangapattana taluk.
It can be reached by two roads; Yelwal - Srirangapattana Road and Pandavapura - KRS Road. Nearest railway station is Krishnarajasagar (Station Code:KJS), but Mysuru Junction railway station is the most feasible option.