ZIP Code 91321 is completely within the 27th US Congressional District of California and is currently represented by Republican Mike Garcia.
ZIP Code 91321 is within two California State Assembly districts: the California State Assembly District 38 currently represented by Democrat Steve Bennett. the California State Assembly District 39 currently represented by . ZIP Code 91321 is within two California State Senate districts: California State Senate District 21 currently represented by Republican Scott Wilk and California State Senate District 27 currently represented by Democrat Henry Stern.