A profile of the socio-economic characteristics of the permanent residents of Canada holding an earned doctorate is presented. In 1973, there were 27,410 Canadian residents who had obtained an earned doctorate. (Holders of such professional doctoral degrees as Doctor of Medicine are excluded from this study.) Only 9 percent of the Ph.Ds were women. More than 89 percent of the Ph.Ds were between the ages of 30 and 53, and over 55 percent received their doctorate degrees between 1965 and 1973. Only 42.4 percent of the Ph.D population obtained their degrees at a Canadian university. About 32 percent of the Ph.Ds had been conferred in the United States, and 22.9 percent were conferred in European countries, particularly Great Britain. Slightly over 50 percent of the Canadian Ph.D population immigrated to Canada. Of the immigrants, 25 percent came from the United States, 25 percent from Great Britain, and 25 percent from other European countries. Over 60 percent of the Ph.Ds are working in the education sector, and over 65 percent of these Ph.Ds are under 45 years old, severely restricting the replacement opportunities in this sector. Male Ph.Ds hold 95 percent of the positions in most occupations and earn significantly higher salaries than female Ph.Ds. Fourteen tables present extensive data on the labor force status, age structure, geographic origin, immigration, income, employment, and legal residence of Canadian residents holding doctorate degrees. (SC)