Joseph Natalio Baca Jr. (born October 8, 1969) is an American educator and politician who served one term as a member of the California State Assembly from the 62nd District from 2004 until 2006.

He stepped down to make an unsuccessful run for the State Senate in 2006, losing the primary to Gloria Negrete McLeod.

He is the son of former Congressman Joe Baca; his brother Jeremy made an unsuccessful bid to succeed him in the Assembly, as he lost the primary to Wilmer Carter.

In 2019, Baca announced a run for San Bernardino County Supervisor (5th District).

His legislative priorities included addressing homelessness in California, promoting economic development, and improving local infrastructure.