Tri-County Athletic Association

The Tri-County Athletic Association (TCAA) is a high school athletic conference in California affiliated with the CIF Southern Section. Established in 2006, the association is an amalgamation of the Tri-Valley League and the Frontier League. The TCAA uses a system of promotion and relegation to place each school's teams, by sport and gender, into either league for a two-year period based on performance. As of the 2018–19 school year, the association is composed primarily of private schools located in Santa Barbara and Ventura counties.

In 2018, five public-school members of the TCAA left to form the Citrus Coast League. Santa Clara High School, a private Catholic school, also joined that league for football only.

Member schools

 * Bishop Diego High School (2006–present; joined Marmonte League in 2014 for football)
 * Cate School (2014–present)
 * Foothill Technology High School (2014–present)
 * Grace Brethren High School (2006–present; joined Marmonte League in 2014 for football)
 * La Reina High School (2006–present)
 * Providence School (2018–present)
 * Santa Clara High School (2006–present; joined Citrus Coast League in 2018 for football)
 * St. Bonaventure High School (2006–present; joined Marmonte League in 2010 for football)
 * Thacher School (2014–present)
 * Villanova Preparatory School (2006–present)
 * Laguna Blanca School (2017–present)
 * Dunn School, Los Olivos (2019–present)

Former members

 * Carpinteria High School (2006–2018; joined Citrus Coast League)
 * Fillmore High School (2006–2018; joined Citrus Coast League)
 * Malibu High School (2006–2018; joined Citrus Coast League)
 * Nordhoff High School (2006–2018; joined Citrus Coast League)
 * Oak Park High School (2006–2014; joined Coastal Canyon League)
 * Oaks Christian School (2006–2014; joined Marmonte League in 2010 for football and 2014 for all other sports)
 * Santa Paula High School (2006–2018; joined Citrus Coast League)

Sports
The Tri-County Athletic Association sponsors the following sports:

Fall season

 * Cross country
 * Girls' volleyball
 * Girls' tennis


 * Girls' golf

Winter season

 * Basketball
 * Soccer
 * Girls' water polo
 * Wrestling

Spring season

 * Baseball
 * Boys' golf
 * Softball
 * Swimming and diving
 * Boys' tennis
 * Track and field
 * Boys' volleyball