California's 73rd State Assembly district is one of 80 California State Assembly districts.

It is currently represented by Democrat Cottie Petrie-Norris of Irvine.

The district encompasses a large portion of central Orange County, anchored by the city of Irvine and portions of surrounding communities.

It is primarily affluent and features many newly developed master-planned communities.

Due to redistricting, the 73rd district has been moved around different parts of the state.