University of California System

University of California System

The University of California is a public land-grant research university system in the U.S. state of California. Derived from Wikipedia licensed CC-BY-SA.

Open Access statistics for University of California System, United States, covering academic research published from 2000 to 2024. Read More.


Open Access Percentage

51%


Total
Publications

1.3M


Total Open
Publications

686K


Total
Citations

70M


Open Access
Percentage

51%


Total
Publications

1.3M


Total Open
Publications

686K


Total
Citations

70M

Wikipedia

Website

download

Breakdown

15% 22% 12% 51%

Publisher Open

15%

Both

22%

Other Platform Open

12%

Closed

51%

Percentage of Open Access over time

0%10%20%30%40%50%60%70%80%90%100%
2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024

Publisher Open

Both

Other Platform Open

Closed

Volume of Open Access over time

010k20k30k40k50k60k70k80kTotal Publications
2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024

Open

Closed

Publisher Open

44%OA Journal

OA Journal 44%

205K

Hybrid 26%

123K

No Guarantees 30%

143K

Other Platform Open

Domain 52%

237K

Institution 33%

153K

Other Internet 31%

141K

Preprint 15%

68K

Public 3%

13K

Other Platform Locations

Name

Platform Type

Publications

PubMed Central
Domain
237K
Unknown Repository
Other Internet
91K
U.S. Department of Energy Office of Scientific and Technical Information - OSTI OAI
Institution
85K
arXiv
Preprint
64K
DOI
Other Internet
60K
California Digital Library - eScholarship
Institution
13K
Le Centre pour la Communication Scientifique Directe - HAL - Diderot
Institution
12K
Europe PMC
Domain
12K
Figshare
Public
12K
DANS - Data Archiving and Networked Services
Institution
9.2K
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Data updated 18 August 2025

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