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. The current iteration resulted from the 2011 redistricting by the California Citizens Redistricting Commission.