| Kioichō | |
| Native Name: | 紀尾井町 |
| Native Name Lang: | ja |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: |  Japan |
| Subdivision Type1: | Region |
| Subdivision Type2: | Prefecture |
| Subdivision Type3: | Special Ward |
| Subdivision Type4: | Neighbourhood |
| Subdivision Name4: | Kōjimachi |
| Subdivision Name1: | Kantō |
| Subdivision Name2: | Tokyo |
| Subdivision Name3: | Chiyoda |
| Population Total: | 452 |
| Population As Of: | 2017 |
| Timezone1: | JST |
| Utc Offset: | +9 |
| Postal Code Type: | Postal code |
| Postal Code: | 102-0094 |
| Area Code: | 03 |
| Registration Plate: | 品川 |
is a district located in Chiyoda, Tokyo.
Once a samurai town, the name of the district is a portmandeau derived from the names of the Kii clan, the Owari clan, and the Ii clan, all of whom had residences there during the Edo era.[1] The Hotel New Otani Tokyo, Sophia University, Yahoo! Corporation, and Shimizudani Park are located within the district.
operates public elementary and junior high schools. Banchō Elementary School (千代田区立番町小学校) is the zoned elementary school for Kioichō.[2] There is a freedom of choice system for junior high schools in Chiyoda Ward, and so there are no specific junior high school zones.[3]