While there is a large international literature on the prevalence of gender segregation of jobs, there are very few detailed empirical studies of the degree of gender segregation in the urban labour market in India, as well as of trends in occupational segregation. Examining changes in the gender profile of occupations is particularly relevant in the context of economic liberalisation, to understand, for example, the type of work opportunities becoming available to women workers. In this paper, we estimate the degree of gender segregation in urban employment in the 1980s and 1990s based on data from the National Sample Surveys for the years, 1983, 1993-94 and 1999-2000. The analysis is based on the National Classification of Occupations (1968), which has 95 two-digit occupations and 462 three-digit occupations. The methodology uses simple statistical measures of female representation as well as aggregate indices of segregation such as the Duncan Index of Dissimilarity, the Gini Index and segregation curves.