Abstract: The article analyses prosopographic database developed on the basis of Political Prisoners Aid Society “Moscow Political Red Cross”. The source base of the database is census papers of political prisoners collected by the MPRC legal department stored in the Russian Federation State Archive, Fund Р-8419. Most of them are introduced into scientific turnover for the first time. Reconstruction of the social portrait of political prisoners demonstrated the prevalence of literate people among them compared to the distribution of the literacy level in the country population in general. Occupational dominants have been found out. For instance, workers and clerks turned out to be prevailing among political prisoners while military men, civil servants and professionals were few in number. The number of peasants was small. These were mainly “hostages”or those arrested for taking part in peasants’ uprisings. It was also found out that most of political prisoners changed their occupation after revolution. The majority of political prisoners were Russians. It is no surprise that the share of women turned out to be small thus being in line with the supposition about bigger activity of males in political events of the time. The analysis demonstrated that political prisoners were primarily young males aged to 35. Most of the arrested had dependants. Over a half of political prisoners suffered from various diseases.