4-H Professional Research Knowledgebase and Competencies 2004 (PDF)
4-H-USA - combines the many national and state 4-H Web sites together in one place.
National 4-H Headquarters - maintained/sponsored by CSREES (Cooperative State Research, Education and Extension Service) and USDA (US Department of Agriculture).
National 4-H Web - This site is maintained by the National 4-H Youth Technology Leadership Team and hosted by NC State University
4-H After-School
Clover Corner News is a weekly newsletter that details news and events throughout the 4-H system.
Essential Elements of 4-H (PowerPoint Presentation)
Journal of Extension
Military 4-H
National 4-H Cooperative Curriculum System Inc. (CCS)
National 4-H Council -  is the national, private sector non-profit partner of 4-H and the Cooperative Extension System. It manages the National 4-H Conference Center in Chevy Chase, Maryland, and the National 4-H Supply Service.
National 4-H Hall of Fame
National 4-H Leadership Trust The National 4-H Leadership Trust is the deliberative body that crafts and implements a unified voice and a national presence for the stewardship of 4-H youth development as supported by the Cooperative Extension System and its partners.
National 4-H Supply Service - the authorized agent for items bearing the 4-H name and emblem.
National 4-H Youth Directions Council
National Association of Extension 4-H Agents (NAE4-HA)
National Extension Diversity Center
National Junior Master Gardener