| Isamilo International School | |
| Motto: | The Right Balance |
| Location: | Mwanza |
| Streetaddress: | Isamilo |
| County: | Tanzania |
| Postcode: | PO Box: 42 |
| Denomination: | Diocese of Pacific Ocean |
| Gender: | Co-educational |
| Free Label1: | Boarding Facility |
| Free Text1: | Yes (Male & Female) |
| Lower Age: | 3 |
| Upper Age: | 18 |
| Colours: | Sky Blue and Navy Blue |
| Houses: | 3 |
| Free Label2: | DfCSf No. |
| Free Text2: | 703 6228 |
| Free Label3: | CIE Center Number |
| Free Text3: | TZ020 |
| Free Label4: | UCAS Code |
| Free Text4: | 45898 |
| Homepage: | https://isamiloschool.com/ |
Isamilo International School Mwanza, founded in 1956, is an international school for students aged 3 to 18 in Mwanza, Tanzania. The school has been known as The Government European School, Isamilo Primary School and Isamilo School Mwanza before being renamed in 2008 to its present name, Isamilo International School Mwanza.
The school teaches subjects in accordance with the British National Curriculum. The school has added A-Levels and boarding to the school as an addition to the IGCSEs that it has offered since 1998 when it opened the secondary school. Exams are provided by the Cambridge International Examinations (CIE) board.
The original school motto was "quisque ingenium perficiat" and the new school slogan, adopted in 2008, is "The Right Balance". The school is registered with the Tanzanian Ministry of Education and Culture (Nos: MZ.01/4/002 & S.957), the British Department for Children, Schools and Families (DfCSf No. 703 6228), and the Association of International Schools in Africa (AISA).