Isidore Bernard Dockweiler (December 28, 1867 – February 6, 1947) was a prominent California lawyer and politician from a pioneering Los Angeles family.

He was affectionately called "Pequeno Ysidro" by Bishop Francisco Mora y Borrell, then the prelate of La Iglesia de Nuestra Señora la Reina de los Ángeles in Los Angeles, who personally baptised him.

Dockweiler helped secure California's vote for Woodrow Wilson, who would become President of the United States.

Dockweiler was defeated in the August 31, 1926 Democratic primary for the U.S. Senate nomination for California, losing to John B. Elliott.

Dockweiler served thrice as a delegate to the Democratic National Conventions of 1908 (Denver), 1936 (Philadelphia), and 1940 (Chicago).

One of his sons, Thomas A. J. Dockweiler, would also receive knighthood later as a Knight Commander of Saint Gregory (KCSG).

By an act of the U.S. Congress, Dockweiler Station Post Office, was named in his honor in Los Angeles.

Dockweiler served as a member of that same commission from his appointment by California Governor Earl Warren on March 22, 1943, until his death.