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Popular Socialist Union Unión Socialista Popular | |
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| Founded | 12 October 1967 |
| Dissolved | January 1990 |
| Split from | Socialist Party of Chile |
| Merged into | Socialist Party of Chile |
| Headquarters | Santiago de Chile |
| Ideology | Democratic socialism |
| Political position | Centre-left to left-wing |
The Popular Socialist Union (Spanish: Unión Socialista Popular) was a Chilean centre-left to left-wing political party that existed between 1967 and 1990.