Junior Seau Pier Amphitheatre, Performing arts center at Oceanside Pier, Oceanside, California, United States.

The Junior Seau Pier Amphitheatre is a bandshell complex at the foot of the Oceanside Pier, built as the third bandshell on this beach site after earlier structures of 1919 and 1927. The current structure dates from 1937, a Works Progress Administration project altered in 1950, with permanent benches for 1500 people plus room for 1000 folding chairs.

The first bandshell on this beach site was built in 1919, replaced by a second in 1927. The current Oceanside Bandshell was constructed in 1937 as a Works Progress Administration project and significantly altered in 1950. It is the third structure in the series and was renamed for Junior Seau in 2012.

The amphitheater serves as a gathering place for community celebrations like Juneteenth and Cinco de Mayo, where residents come together to share traditions and mark important occasions. Local high school graduates also celebrate their achievement here with family and friends.

The amphitheatre sits at the foot of the Oceanside Pier, right on the beach, a few blocks from Junior Seau's former home. Permanent benches seat 1500, with room for 1000 more folding or temporary chairs. It is the graduation venue for Oceanside High School and hosts the annual Tea Party rally around April 15 and Operation Appreciation each May.

The bandshell appears in the 2000 film Bring It On as the venue for a cheerleading competition. The current structure is the third bandshell at this spot, following earlier ones from 1919 and 1927.