| Finnish: Keski-Vuosaari | |
| Other Name: | Swedish: Mellersta Nordsjö |
| Settlement Type: | Helsinki Subdivision |
| Pushpin Map: | Finland Helsinki#Finland Helsinki (mainland)#Finland |
| Subdivision Type: | Country |
| Subdivision Name: |  Finland |
| Subdivision Type1: | Region |
| Subdivision Name1: | Uusimaa |
| Subdivision Type2: | Sub-region |
| Subdivision Name2: | Greater Helsinki |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Helsinki |
| Subdivision Type4: | District |
| Subdivision Name4: | Eastern |
| Parts Type: | Subdivision regions |
| Parts Style: | para |
| P1: | none |
| Total Type: | |
| Area Total Km2: | 2.59 |
| Population Total: | 12,568 |
| Population As Of: | 2005 |
| Population Density Km2: | 4,852 |
| Postal Code Type: | Postal codes |
| Postal Code: | 00960, 00980 |
| Blank Name Sec1: | Subdivision number |
| Blank Info Sec1: | 541 |
| Blank1 Name Sec1: | Neighbouring subdivisions |
| Blank1 Info Sec1: | Kallahti, Rastila, Vartioharju, Mellunmäki, Mustavuori, Nordsjön kartano, Aurinkolahti |
Keski-Vuosaari (Finnish), Mellersta Nordsjö (Swedish) is an eastern neighborhood of Helsinki, Finland.