California Code, Code of Civil Procedure - CCP § 203

(1) Persons who are not citizens of the United States.

(2) Persons who are less than 18 years of age.

(3) Persons who are not domiciliaries of the State of California, as determined pursuant to Article 2 (commencing with Section 2020) of Chapter 1 of Division 2 of the Elections Code.

(4) Persons who are not residents of the jurisdiction wherein they are summoned to serve.

(5) Persons who have been convicted of malfeasance in office and whose civil rights have not been restored.

(6) Persons who are not possessed of sufficient knowledge of the English language, provided that no person shall be deemed incompetent solely because of the loss of sight or hearing in any degree or other disability which impedes the person's ability to communicate or which impairs or interferes with the person's mobility.

(7) Persons who are serving as grand or trial jurors in any court of this state.

(8) Persons who are the subject of conservatorship.

(9) Persons while they are incarcerated in any prison or jail.

(10) Persons who have been convicted of a felony and are currently on parole, postrelease community supervision, felony probation, or mandated supervision for the conviction of a felony.

(11) Persons who are currently required to register as a sex offender pursuant to Section 290 of the Penal Code based on a felony conviction.