As of April 1988, party membership was reported at 89,588, an average of 1 in 11 of the adult population. According to the Rules of the Mongolian People's Revolutionary Party, "anyone of the working people, acknowledging the Party Program and Rules, actively participating in their implementation, working in a party organization, and implementing all party resolutions, may be a member of the party." Membership was open to males and females at least eighteen years old, although those between eighteen and twenty years could earn party membership only through acquiring a good record as a Mongolian Revolutionary Youth League member.

A candidate for party membership must be sponsored by a party member who has held a full membership for three years. After sponsorship, a candidate's acceptance into the party was discussed by a general meeting of the appropriate party cell and was considered resolved if at least two-thirds of those attending approved. Conversely, expulsion from the party was decided by a vote of at least two-thirds of party members present, but it was effective only after confirmation by the appropriate party committee at the next-highest level. Mongolian People's Revolutionary Party membership increased by 16 percent during the period 1981 to 1986.

Data as of June 1989