Dissertation (MSc Natural Resources Management)This study was done in Kondoa District to explore informal land conflicts management institutions in CPRs of Tarangire plains. The study identified types of land conflicts, examined forms and causes of land conflicts and explored patterns of informal institutions used to manage land conflicts. A cross-section research design was adopted. Sampling techniques such as Sampling Frame, Sampling procedure (Simple random and purposive sampling) Sampling unit and Sample size were used. The study used household survey, interviews, focus group discussions and documentary review in data collection. SPSS version 20 was used to process quantitative and qualitative data. Analysis of data was carried out by Cross tabulation, Chi-square, and thematic analysis. Findings show conflict occurring on all types of property (100%) being a major type of land conflict in the study area. The forms of land conflicts such as wildlife utilization and local communities and border land conflict were found as major forms. The major causes of land conflicts were land scarcity, lack of land tenure system and lack of land use plan. Elders, head of clans, head of households and spiritual leaders were mentioned as informal patterns institutions used in managing land conflicts. Chi-square analysis was conducted to determine whether there was an association between location and satisfaction of different patterns of informal institutions managing land conflicts. A significant association was present with chi-square = 41.067, df = 8, p=.000. The study concluded that the local community in the surveyed villages are not satisfied with the measures taken to handle land conflicts by official institutions rather they prefer informal institutions. Thus, the study recommends that to avoid land conflicts, formal institutions should work closely with informal institutions.