We investigate the association between the residential concentration of Chinese in Toronto and discrimination as experienced and perceived by Chinese immigrant residents. A unique aspect of this study is our focus on perceived employment discrimination. We find that Chinese immigrants living in neighbourhoods with a high concentration of other Chinese residents are more likely to perceive employment discrimination against Chinese people as a group, and are more likely to report exposure to ethnically motivated verbal assault, than are Chinese immigrants living elsewhere. Our results are consistent with studies of other populations. However, we argue that theory and policy related to ethnic concentration and discrimination should recognise that effects of ethnic concentration on discrimination are likely to vary with the ecological setting under investigation (for example, neighbourhoods versus larger areas), as well as by size of locale (city, region, or country), and the ethnic groups involved.