Background: Agriculture plays a key role in economic growth, as a source of raw materials, means of income generation, food security, poverty alleviation and employment to the rural population in both developed and developing countries. This study was aimed to investigate the determinants of household income incase of Dera district, Oromia Regional State, Ethiopia.&nbsp; 
Methods: The study was conducted in Dera district from September 2020 to May 2021 at Salale University, Ethiopia. Both primary and secondary source of data were used to obtain the data. Primary data was collected from the selected sample of 234 household heads using structured questionnaire. Multistage random sampling technique was used to select representative sample from Dera district. Both Descriptive statistics (frequency, percentage, mean, variance, etc.) and Econometrics model (multiple linear regression model) were used to achieve the objectives of the study and to analysis the data.&nbsp; 
Result: Using multiple linear regression of two stage least square, household income was significantly affected by place of residence, women household head, women year of education, farm size, access to credit, tropical livestock Unit and women time use at 5% significance level.

Determinants of Household Income Incase of Dera District, Oromia Regional State, Ethiopia