The following individuals are eligible for membership in WACDL:
- Any attorney who is a member of any state bar.
- Any law student is eligible for non-voting membership as a law student member.
- Any professional person who is involved with the criminal justice system but is not an attorney is eligible for non-voting membership as an Associate of Washington Association of Criminal Defense Lawyers.
The following are not eligible for membership in WACDL:
- Persons who perform a prosecutorial function or persons employed in the offices of prosecutors, including, but not limited to, United States Attorneys, City Attorneys, District Attorneys or Attorneys General;
- Any persons who perform any law enforcement investigation of criminal cases including, but not limited to, those employed in law enforcement, including police officers, sheriffs, correctional officers and probation officers;
- Any person engaged in a full-time judicial function, including any full-time judge, commissioner or referee.