California's 42nd Congressional District is located in the southwestern part of the state, primarily covering areas in Riverside County. The district includes cities such as Moreno Valley, Perris, and parts of Riverside. It is known for its diverse population and growing communities. The district is represented in the U.S. House of Representatives and plays a role in shaping federal legislation that affects local issues. The demographics of the district reflect a mix of cultures and backgrounds, contributing to its unique character within California.