| Yashio | |
| Type: | District |
| Pushpin Map: | Japan Tokyo city#Japan Tokyo Bay and Boso Peninsula |
| Pushpin Map Caption: | Location of Yashio within Tokyo##Location of Yashio within Tokyo Bay |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kantō |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Tokyo |
| Subdivision Type3: | Ward |
| Subdivision Name3: | Shinagawa |
| Established Date: | - |
| Population As Of: | April 1, 2021 |
| Population Footnotes: | [1] |
| Population Total: | 11,668 |
| Population Density Km2: | auto |
| Timezone: | JST |
| Utc Offset: | +9 |
| Coordinates: | 35.6001°N 139.7513°W |
| Postal Code Type: | Zip code |
| Postal Code: | 140-0003[2] |
| Area Code: | 03[3] |
is a district of Shinagawa, Tokyo, Japan. The current administrative place names are Yashio 1-chome to Yashio 5-chome. It is an area where the residential address has been displayed. It corresponds to the area on the north side of Ōi Wharf Part 1. The south side of Ōi Wharf 1 is Tokai, Ōta, Tokyo.
Shinagawa City Board of Education operates public elementary and junior high schools.
Yashio 1-3 chome are zoned to Jonan No. 2 Elementary School (城南第二小学校) and Tokai Junior High School (東海中学校). 4-5 chome are zoned to Yashio Gakuen (八潮学園) for both elementary and junior high school.[4]