We examine factors that affect the supply of and demand for female cabinet ministers in Latin America and seek to understand the frequency with which women join cabinets and the types of portfolios women receive. Our analysis covers 18 Latin American democracies from 1980 to 2003. We find that presidents from parties of the left appoint more women. Increases in the percentage of women in the legislature and higher human development correlate with more women in the cabinet. Intense partisan competition increases the likelihood that a cabinet will contain a woman. Women are more likely to receive high-prestige cabinet posts from leftist presidents and when the percentage of women in the legislature increases. In addition, an international diffusion effect appears to explain the rapid expansion of women in Latin American cabinets.