- 4-H is the youth development program of The University of Arizona, College of Agriculture and Life Sciences and Cooperative Extension State 4-H Office University of Arizona P.O. Box 210036 Tucson, AZ 85721-0036 Phone: (520) 621-3623 Fax: (520) 621-1927 http://ag.arizona.edu/4-H/ Last Updated: March 28, 2002 4-H Webmaster: nteresa@ag.arizona.edu Content Questions/Comments: cpeters@ag.arizona.edu ...ag.arizona.edu/4-H