Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
University of California
Division of Agriculture and Natural Resources

Dr. Shannon J. Horrillo

Photo of Dr Shannon J Horrillo
Statewide 4-H Director
California State 4-H Office
University of California, Agriculture & Natural Resources
2801 Second Street
Davis, CA 95618-7774
(530) 750-1334
sjhorrillo@ucanr.edu Create VCard


Dr. Shannon Horrillo joined ANR on May 1, 2011 as the Associate Director of 4-H Program and Policy. On May 1, 2017, Horrillo was appointed Director of the Statewide 4-H Youth Development Program. In her role, Horrillo provides leadership to the implementation of the 4-H Youth Development Program. This includes leadership and oversight to the 4-H Advisory Committees, the 4-H mission mandates (4-H Science, Engineering & Technology, 4-H Healthy Living, and 4-H Citizenship) and the 4-H Thrive and 4-H Military Partnership Programs. Shannon’s expertise is in program administration, youth development and evaluation. She has created and implemented strategic ways to support the growth and development of the 4-H Youth Development Program, volunteers and staff. Horrillo has experience developing high-quality positive youth development programs that are research-based and meet the needs of youth, families and communities in California. She has extensive experience in the development and implementation of large-scale evaluations and in communicating outcomes to stakeholders. Horrillo is also responsible for the development, interpretation, and implementation of UC policies related to the 4-H YDP and oversees the development of new 4-H policies. Before accepting her current position as Associate Director of 4-H Program and Policy, Horrillo served as 4-H Youth Development Advisor for Placer and Nevada counties from 2008 to 2011. Horrillo earned a Ph.D. in Human Development, an M.S. in Child Development and a B.S. in Human Development, all from UC Davis. Horrillo is dedicated to youth development work and enjoys serving the state of California by creating healthy families and communities.  


Ph.D. Human Development, University of California, Davis. 2009
M.S. Child Development, University of California, Davis. 2003
B.S. Human Development, University of California, Davis. 1999


Program Administration, Positive Youth Development, College and Career Readiness, Adolescent Development, Evaluation

Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

Non-Peer Reviewed

  • Dogan, S., Smith, M., McIntyre, D., Barnett, C., & Schmitt-Mc-Quitty, L. (2013). New 4-H project prepares young people for higher education. UC Delivers. Available at: http://ucanr.edu/delivers/?impact=904&delivers=1&called_from_delivers=1

  • Heck, K., Dogan, S. J., Barnett, C., Borba, J., & Conklin-Ginop, E. (2009, Fall). 4-H Study of Positive Youth Development: Report of California’s 2008 Data. Davis, California: University of California, 4-H Center for Youth Development. Available at: http://4h.ucanr.edu/files/1211.pdf

ANR Workgroup Associations

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