Roman Catholic Diocese of Orange

Orange is a city located in northern Orange County, California. It is approximately 3 miles (4.8 km) north of the county seat, Santa Ana. Orange is unusual in this region because many of the homes in its Old Town District were built before 1920. While many other cities in the region demolished such houses in the 1960s, Orange decided to preserve them. The small city of Villa Park is surrounded by the city of Orange. The population of Orange was 139,911 as of 2020.

The Orange Fire Department (OFD) provides fire protection and emergency medical services for the city of Orange, California. The department is responsible for a population of approximately 140,000 people spread across 27 square miles (70 km2). Along with their standard firefighting apparatus, the department also has a Swiftwater rescue team that is available for deployment anywhere in Orange County.

The Serrano Water District is a California special district that maintains the groundwater of parts of eastern Orange County. The agency serves a 4.7 square mile area that encompasses the entirety of Villa Park and a small portion of Orange. The population served is approximately 6,500.The agency was created in 1876 as the Serrano Irrigation District, making it one of the oldest standing water districts in Southern California. Serrano Water District helped to create the Santiago Dam and Irvine Lake. Currently, the agency owns their own water treatment plant, 50% of Irvine Lake, and 43 miles of pipeline.In 2019, Serrano Water District successfully negotiated with the county, OC Parks, and Irvine Ranch Water District to reopen Irvine Lake to public recreation.

Orange High School is a traditional four-year public high school located in the city of Orange, California. Orange High is part of the Orange Unified School District and competes in the Golden West League.

Villa Park High School (VPHS) is a four-year suburban public high school located in the city of Villa Park, California, United States. It was built in 1964 and is one of four comprehensive high schools in the Orange Unified School District. The campus serves students residing in Villa Park and portions of the cities of Orange and Anaheim. Enrollment at VPHS (for the 2020-2021 school year) was 2,185 students. The ethnic breakdown of the student population was 10.4% Asian, 51.5% Hispanic, 0.8% African American and 32.1% white (non-Hispanic). The professional staff includes 88 teachers, six counselors, a library media specialist, a career adviser, an activities director, and three administrators. A dedicated classified staff also supports the school program.The school Academic Performance Index (API) for the 2011–2012 school year was 815, a six-point increase over the previous year. The regular school day begins at 9:25 AM and ends at 3:25 PM. A small number of earlier classes are available for students who want to begin and finish their school day earlier. These "zero period" classes meet from 8:30 to 9:20 AM. A hybrid block schedule has been implemented for the 2022-2023 school year, with students attending all classes on Mondays, then alternating odd and even block periods Tuesday through Friday.

Chapman University's Dale E. Fowler School of Law, commonly referred to as Chapman University School of Law or Fowler School of Law, is a private, non-profit law school located in Orange, California. The school offers the Juris Doctor degree (JD), combined programs offering a JD/MBA and JD/MFA in Film & Television Producing. The school also offers emphasis options in Business Law, Criminal Law, Entertainment Law, Environmental Law, Entrepreneurial Law, International Law, Trial Advocacy, and Taxation. Currently, the school has 74 full- and part-time faculty members and a law library with holdings in excess of 290,000 volumes and volume equivalents.

The Center for American War Letters is a center established in 2013 after historian Andrew Carroll donated more than 100,000 war letters to Chapman University.

Chapman University is a private research university in Orange, California. It encompasses eleven schools and colleges, including Argyros School of Business & Economics, Attallah College of Educational Studies, College of Performing Arts, Crean College of Health and Behavioral Sciences, Dodge College of Film and Media Arts, Fowler School of Engineering, Fowler School of Law, Schmid College of Science & Technology, School of Communication, School of Pharmacy, and Wilkinson College of Arts, Humanities, & Social Sciences. It is nationally ranked by US News & World Report and is classified among "R2: Doctoral Universities – High research activity".

Lutheran High School of Orange County (commonly known as Orange Lutheran High School or OLu) is a private Lutheran high school in Orange, California, in the Los Angeles Metropolitan Area, founded in 1973. The school offers on-campus, online, and blended schedules for its students. Orange Lutheran is accredited by the National Lutheran School Accreditation Organization and the Western Association of Schools and Colleges. The school is also known for its Missions Program, which travels internationally and domestically on a year-round basis.

The Lewis Ainsworth House is a restored American Craftsman style home in the city of Orange, in Orange County, California. The house is one of many preserved historic homes in and around Old Towne Orange. The home currently stands next to St. John's Lutheran Church, across the street from the city's public library, and nearby the Orange City Hall. It is currently owned by the City of Orange.

The Village at Orange is a shopping mall located in Orange, California, formerly called The Mall of Orange and at first, officially (and later, popularly) the Orange Mall. The mall is currently anchored by Walmart on the north side.

El Modena High School, colloquially called El Mo or ElMo, is a traditional four-year public high school located in the El Modena neighborhood of the City of Orange in Orange County, California. It is one of four high schools in the Orange Unified School District, along with Villa Park High School, Orange High School, and Canyon High School. Founded in 1966, its first class graduated in June 1968, the school celebrated its 50th anniversary during the 2016–17 school year. In 2019 construction began after district voters approved Measure S in November 2016.