Every human community has its unique culture which must be respected and enhanced by its members. Culture shapes the way people see themselves and others, and how they interact with others. The town of Buea has recently experienced a tremendous population growth rate with the pull factor been its calm nature despite the present socio-political crisis. The urbanism of the area could be characterised by the proliferation of many churches, the presence of many associations and cultural groups. In the midst of all this, it is sometimes very difficult to actually know people’s personality or cultural affiliations; the cultural diversity of people found in Buea, and how this diversity affects their relationship with one another had been a great concern. This study therefore is aimed at examining the effect of ethnic diversity on social relation within the different ethnic groups that are found around Buea. Data was gotten through critical observation, and with the use of an open-ended questionnaire and interview guide, vital information was obtained from 100 respondents drawn from the neighborhoods of Molyko, Great-Soppo, and Buea-Town and purposive sampling technique was deployed. The data was analyzed using qualitative and quantitative approach. The findings reveal that aspects of ethnic diversity which are very eminent amongst the settlers of Buea, have to a certain extend affected their social relations though in most cases they are doing all to adhere to the principle of ‘unity in diversity’. The research concludes that though people relate at a reduced rate through ethnic lines, social relations amongst the different ethnic groups in Buea is cordial; despite their differences they are doing all to ensure that they strive for the same passion and common goals. The researcher therefore recommends that the government of Cameroon should develop Pidgin Language and make it an official language and that it should ensure that the Department of Cultural Sciences be extended to other State and Private Institutions in Cameroonians.