U.S. Youth Soccer Association (USYSA [1])(largest youth soccer organization, with over 3 million players from age 6 through 19; covers entire country through state associations in all 50 states; youth division of U.S. Amateur Soccer, includes high level play through Olympic Development Program (ODP).
American Youth Soccer Organization (AYSO) [2](625,000 registered players, plus 92,000 volunteer coaches, 47,000 referees; emphasis is on participation of all players and recreational play). [3]
Soccer Association For Youth (SAY) [4](80,000 members). [5]
National Soccer Coaches Association of America (NSCAA) [6](youth, high school, college and professional soccer coaches).
USYSA: contact state association or national office (800-4-SOCCER) about "Top Soccer"
AYSO: ask about VIP Program For Kids With Special Needs
Soccer America (weekly newspaper with a bimonthly section on youth soccer); subscription includes Soccer America Yellow Pages
Soccer Jr. (bi-monthly magazine for youth soccer players; "Soccer For Parents" supplement comes out twice a year. Call (800) 829-5382 to subscribe or send $16.97 to Soccer Jr., P.O. Box 420442, Palm Coast, FL 32142-9744
Links:
[1] http://www.youthsoccer.org
[2] https://mail.momsteam.com/www.soccer.org
[3] http://www.soccer.org/
[4] http://www.saysoccer.org
[5] http://www.saysoccer.org/
[6] http://www.nscaa.com
[7] http://www.reedswain.com
[8] http://www.britanniasoccer.com
[9] http://www.soccerclinics.com