Digital Collections
- Cochems (Edward W.) Photographs | Approximately 1,200 photographs taken by a prominent commercial photographer in Santa Ana, California, between ca. 1919-ca. 1949
- Egan (Richard) Manuscript Maps of Orange County | Four manuscript survey maps and one plat map depicting areas of Orange County, ca 1878
- Gerhardt (Wally) Photograph Collection | Over 1,400 photographs and six boxes of unprinted negatives of Newport Beach, Costa Mesa, Corona del Mar, and other Orange County, California, localities taken in the 1940's and 1950's
- McMillan (Hugh R.) Photographs | Approximately 3000 black and white photographic negatives of Newport Beach and surrounding areas of Orange County, California in the mid-20th century
- Modjeska (Helena) Collection | Titi, Nunu i Klembolo czyli Przygody dwóch liliowych chłopczyków i psa o sześciu nogach, a handmade and illustrated book of fairy tales created by Helena Modjeska for her grandson Felix Bozenta Modieski.
- Orange County Californio Families Portrait Photograph Album | An album of 66 studio photographs, carte de visites, and tintypes of early and prominent Californio family members
- Orange County Lesbian, Gay, Bisexual, and Transgender Timeline Research Files | The "Orange County Historical LGBT Timeline," maintained ca. 1995 - 2004
- Orange County Rancho Title Abstracts | 3 bound, handwritten title abstracts, prepared by the Abstract and Title Insurance Company of Los Angeles, containing transcriptions of documents, dating back as early as 1868
- Pleasants Family Papers | The personal papers of J.E. Pleasants and his first and second wives, Mary Refugio Carpenter Pleasants and Adelina Pleasants
- Women's March on Washington Orange County | 19 digital oral histories recorded at the Women's March on Washington, Orange County, 2017
Exhibits
- Water in California: Issues, Impacts & Innovation | Winter 2018
- Costuming the Leading Ladies of Shakespeare: From Stratford to Orange County | April 2018 - November 2018
- Striking a Balance: Conservation and Development in Orange County | October 2016 - May 2017
- Open Air & Light: Art in Laguna Beach, 1906-1941 | October 2013 - April 2014
- Irvine: the Vision, the Plan, the Promise | May 2011 - October 2011
- Immigrant Lives in “The OC” and Beyond | November 2008 - May 2009
- Picturing Californios: An Orange County Family Photograph Album
- From Ranchos to Real Estate: Orange County's Early Years | Winter/Spring 1997