Population of San Sebastián, Puerto Rico as of October 2025. How many people live in San Sebastián today?

Puerto Rico / San Sebastián

The exact population of San Sebastián as of October 2025 is estimated at 39,345 residents. Please note: this figure is an estimate and may slightly change as people get born and pass away, it also depends on migration to/from San Sebastián.

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Check out more data on population in Puerto Rico:

San Lorenzo
Aguada
Hatillo
Manatí
Cidra
Gurabo
Cayey

This population of San Sebastián is provided by the local bureau of statistics.
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