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AYSO San Mateo Region 36


Welcome San Mateo Region 36 Referees

Each fall season, we need 300+ referees helping over 1,600 players from ages 5 to 19 play soccer. We invite parents and youths (12 year old or over) to serve as AYSO referees. Youth referees may satisfy middle or high school community service requirements by volunteering to referee AYSO games. No prior experience or knowledge of the Laws of the Game is required. All volunteers are trained, certified, equipped, and mentored to be great referees!

Each 6U and 8U team needs to have at least 2 team referees. Details on how to become a 6U/8U Referee for your child's team are on the 6U-8U Divisions page under Registration and Training.

Each 10U and 12U team needs to have at least 2 team referees. Details on how to become a Regional Referee for your child's team are on the 10U-19U Divisions page under Registration and Training.

Referees who wish to officiate at 14U or higher are highly encouraged to upgrade their referee badge level. Details are on the 10U-19U Divisions page. 

Latest Referee Updates, as of April 5, 2020

Referee Registration

  1. Want to help your child play better and be involved in their development? Submit your volunteer application, following these detailed instructions, to be a referee for their team.


  1. All volunteers must take Safe Haven (if you did not take it in 2019 or in 2020) and CDC Concussion Training (if you have not taken it before) at AYSOU ( You will need to login to AYSOU using your Blue Sombrero username/password to take and receive credit for these online courses. Make sure to save your certificates of completion (screenshot or take a picture).
  2. New 6U-8U referees? Go to our 6U-8U Divisions page for the class schedule.
  3. New Regional (10U-12U) Referees? After taking your Regional Referee online course, details at 10U-19U Divisions page for where you can go for field training.
  4. Want to improve your referee skills? Upgrade to Intermediate, Advanced, and National Referee certifications.

Signing up for Matches

  1. For 10U through 14U, all certified and trained referees may sign up for specific matches at If you do not have an account on the referee website, please contact William at [email protected]
  2. For 16U and 19U, referees sign up at Please contact [email protected] if you wish to officiate at 16U/19U matches.

Law Changes and Referee Guidance

  1. The 2019-2020 IFAB Laws of the Game are available and AYSO has provided a 1-page summary of these LOTG and associated PDI rules.
  2. 6U-8U Referee cheatsheets: get them from our 6U-8U Divisions page, under Resources.
  3. 10U-12U Referee guidance: get a 2-page summary for referees officiating in the 10U and 12U Divisions on our 10U-19U Divisions page, under Resources.
  4. What's the Build-out Line on the 10U fields? Video: applying the build-out line in 10U matches
  5. 14U: Unlimited substitutions. At the discretion of the Referee, EITHER team may substitute during a stoppage in play. Substitutes must be ready to enter the field, at the halfway line, before play has stopped and enter the field only when beckoned by the referee.

Why Referee?

  • Help your team
    • For 6U or 8U divisions, you are on the field with your child helping the teams learn the game of soccer.
    • For 10U or 12U divisions, you can help your team earn bonus points to improve their standing for our end of season regional tournament.
  • Youths who referee may be able to apply their volunteer hours to their school's community service requirement.
  • It's fun!

Registration and Training

All referee volunteers must follow the following four steps in order to referee.

STEP 1: Register as a volunteer in the National AYSO database.
  • Please visit and select the Register Now button (if you have not registered before in Blue Sombrero) or Login button and register as a volunteer for this season.
  • A parent must submit the application for a youth volunteer. The youth volunteer will need their own Blue Sombrero user account.
STEP 2: Complete the online AYSO Safe Haven course (20-30 minutes).
  • Please take Safe Haven training at (AYSO's Safe Haven).
  • You will need to login using your AYSO Blue Sombrero username/password.
STEP 3: Complete the online CDC Concussion Awareness course (20-30 minutes).
  • Please take AYSO CDC Concussion Awareness training at
  • You will need to login using your AYSO Blue Sombrero username/password.
STEP 4: Take the age-appropriate referee course, if you have not taken it before.
  • 6U-8U Referee Class for 6U and 8U divisions
  • Regional Referee online training and the Regional Referee Field Session for 10U and 12U divisions

National Partners

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Contact Us

San Mateo Region 36

P.O. Box 5316 
San Mateo, California 94402

Email Us: [email protected]
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