Welcome to San Mateo Little League American!

Spring 2026 Registration Is Open! 

We are excited to announce that registration for the 2026 spring Little League baseball season is open! Click the green button below to register with San Mateo Little League American (SMLLA).  Should you run into any issues or have questions about registering your player, please reach out to us at [email protected]. We're happy to help and will respond as soon as possible.

• RETURNING PLAYERS: Expect online registration to take no more than a few minutes. Information from the prior season(s) should populate automatically. You do not need to provide proof of the player’s age or residency if they were previously provided.

• NEW PLAYERS: Expect online registration to take approximately 10 minutes. You will be asked to provide proof of the player’s age (birth certificate or passport) and at least three ways to prove residency (in PDF or JPG format). Click HERE and HERE for the Little League eligibility requirements.

• NEW PARENT/GUARDIAN: You cannot register your child without creating an account first. If you are new, click HERE to join.  Please be sure to add a 2nd parent/guardian, if any, as an additional account holder so you both receive team and league communications.