Province of Ontario Savings Office
| Company type | Crown agency |
|---|---|
| Industry | Banking |
| Founded | 1922 |
| Defunct | April 1, 2003 |
| Fate | Privatized and acquired by Desjardins Group |
| Successor | Desjardins Credit Union |
Area served | Ontario |
| Owner | Government of Ontario |
The Province of Ontario Savings Office (POSO) was a financial institution established by the Government of Ontario, Canada in 1922 to provide a government-owned alternative to banks. The POSO was closed in 2003 when its assets were sold to the Quebec-based Desjardins Group cooperative of caisses populaires (credit unions) to form Desjardins Credit Union. In 2011, Desjardins Credit Unions in Ontario were transferred to Meridian Credit Union.