| Katjunagar | |
| Other Name: | Katju Nagar |
| Settlement Type: | Neighbourhood in South Kolkata, Kolkata |
| Pushpin Map: | India Kolkata#India West Bengal |
| Pushpin Map Caption: | Location in Kolkata |
| Subdivision Type: | Country |
| Subdivision Name: | India |
| Subdivision Type1: | State |
| Subdivision Name1: | West Bengal |
| Subdivision Type2: | City |
| Subdivision Name2: | Kolkata |
| Subdivision Type3: | District |
| Subdivision Name3: | Kolkata[1] |
| Subdivision Type4: | Subway/ Metro station |
| Subdivision Name4: | Rabindra Sarovar, Mahanayak Uttam Kumar |
| Seat Type: | Municipal Corporation |
| Seat: | Kolkata Municipal Corporation |
| Parts Type: | KMC ward |
| Parts: | 93 |
| Unit Pref: | Imperial |
| Elevation Ft: | 39 |
| Timezone: | IST |
| Utc Offset: | +5:30 |
| Coordinates: | 22.495°N 88.37°W |
| Postal Code Type: | PIN |
| Postal Code: | 700 032 |
| Area Code: | +91 33 |
| Blank1 Name Sec1: | Lok Sabha constituency |
| Blank1 Info Sec1: | Kolkata Dakshin |
| Blank2 Name Sec1: | Vidhan Sabha constituency |
| Blank2 Info Sec1: | Rashbehari |
Katjunagar is a neighbourhood located in South Kolkata in the city of Kolkata, West Bengal, India. The adjacent neighbourhoods to the locality include Jadavpur, South City, Poddar Nagar, Jodhpur Park, Lake Gardens, Bikramgarh and Golf Green.
Some important institutes in and around the locality include Central Glass and Ceramic Research Institute, Regional Institute of Printing Technology, APC Polytechnic, Indian Association for the Cultivation of Science, Jadavpur University, Indian Institute of Chemical Biology, etc.It is well known for its proximity to South City Mall, Jadavpur University, Gariahat, Prince Anwar Shah Road, Jadavpur railway station and 8B Bus Stand.