This paper studies on caste homophily across seventy-five villages in rural Karnataka, India. Caste is conceptualized as a system of ethnic categories that map onto positions within the social structure of each village. Despite being a salient category across India, the caste structure is not uniform across villages, caste groups or network contexts. Using social network and demographic data collected by Banerjee et al.(2013) I investigate how caste homophily varies within villages across social contexts and between villages. Overall I find strong evidence of caste homophily across the majority of contexts; people tend to exchange resources and socialize with other people occupying a similar position in the caste order. However this varies across villages, relations, and groups. It appears to be strongest among higher caste groups, although it weakens with regards to the lending and borrowing of money, a vertical relationship between high and low castes. The lending of rice and kerosene and social relationships involving advice giving and important decisions are also particularly homophilous for both groups. This demonstrates how the strength of ethnic boundaries can vary based on the relational and spatial context.