The Ada Independent School District is a school district based in Ada, Oklahoma (United States). It includes seven schools and serves more than 2,600 students.^[1]

The district has a jagged eastern border that stretches as far N3930 Road. Its western boundary is west of U.S. Route 377 in the north and S. Oak Avenue in the south.

• Glenwood Early Childhood Center, houses six educational programs geared toward early childhood (4–5 years old)

• Hayes Grade Center, 1st and 2nd grade
• Washington Grade Center, 3rd and 4th grade

• Willard Grade Center, 5th and 6th grade
• Ada Junior High School, 7th through 9th grade

• Ada High School, 10th through 12th grade
• STEPS: Alternative Education Academy

The high school is home to the Ada Cougars, who have won 19 state football championships (1951-2, 1955–7, 1959, 1962, 1964–5, 1970, 1974, 1980, 1986, 1988, 1991, and 1993–6) - the most in Oklahoma. Ada High School is also the home of Cougar News Network, a high school news program, which appears on Public-access television. Among the many outstanding extracurricular activities and sports programs available to students is the award-winning Ada High School Cougar Marching Band.

• List of school districts in Oklahoma

• Ada Overview