The 27th District includes:

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San Gabriel Foothills
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Alhambra
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Altadena
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Arcadia
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Bradbury
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Claremont
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East Pasadena
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Glendora
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Monterey Park
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Pasadena
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Rosemead
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San Antonio Heights
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San Gabriel
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San Marino
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Sierra Madre
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South Pasadena
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South San Gabriel
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Temple City
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Upland