ear-universal marriage characterized most Asian countries in the past. Over the past two decades, however, there has been a dramatic increase in the proportions of women remaining single in their 30s and 40s in many East and South-east Asian countries, especially in their big cities. In 2000, 17 per cent of women aged 45-49 in Bangkok remained single, 13 per cent in Singapore and 10 per cent of Chinese women in Kuala Lumpur. The proportions remaining single were particularly high among tertiary educated women. As educational levels keep rising, this alone will tend to increase the proportion of women remaining single near the end of their reproductive life.High non-marriage rates are not confined to any one religious or ethnic group. By the same token, the trends are not monolithic throughout the region. Even in the Philippines and Thailand, which are both characterized by relatively high proportions of women non-married in their 30s and 40s, the path by which these high proportions were reached differed. The 2000 Census data do show sharp increases in proportions non-married among women in their 30s in some countries where non-marriage rates were low, notably the Republic of Korea and Indonesia.This paper describes the trends in delayed marriage and non-marriage in the region, for both men and women. It assesses likely reasons for these trends, discusses community reactions to the trends, and considers some of the likely implications for women's place in family and society, for trends in fertility, and for the family role in aged care. A number of policy issues resulting from the trends in non-marriage are discussed.