The Working Class Party became ballot-qualified in Maryland in March 2020. Therefore, it is listed as a choice on voter registration forms in Maryland. The Maryland State Elections Board tallies registration each month. The Working Class Party, starting from zero, is slowly increasing. In April it had 20 registered members; in May it had 61; and in June it had 246.
The Working Class Party is also on the ballot in Michigan, but Michigan does not have registration by party, so the party has no registered members in Michigan.