California's 25th senatorial district is one of 40 California State Senate districts.

It is currently represented by Democrat Sasha Renée Pérez of Alhambra.

The district encompasses most of the San Gabriel Mountains and its adjacent San Gabriel Valley foothill communities.

It stretches from the eastern San Fernando Valley in the west to the far western Inland Empire in the east.

Most of the district's population is in the western half of the district, anchored by Glendale and Pasadena.