California's 9th Congressional District is located in the northern part of the state, primarily encompassing parts of San Joaquin County. The district includes cities such as Stockton, Lodi, and Manteca, and is known for its diverse population and agricultural economy. The district is represented in the U.S. House of Representatives and has historically leaned Democratic. It plays a significant role in local and national politics, addressing issues such as education, healthcare, and infrastructure to meet the needs of its residents.