The main objective of this study was to identify and classify spelling errors and indicate possible sources of the errors that occur in the writings of Primary School students. The study randomly selected 64 grade five students from Darara Alaku Primary School, The study used descriptive design and primary data sources. To this end, spelling errors obtained from the students dictation test and two school teachers’ interview responses were analyzed to determine intra and inter-language related spelling errors committed by the students. To elicit the possible spelling errors from the participants, the study used dictation test, and key informant interview as data gathering tools. In the end, the data were qualitatively and quantitatively analyzed. Accordingly, descriptive statistics such as percentage and frequency distribution were used to analyze quantitative data. Data obtained through open ended question and key informant interview were analyzed qualitatively using content analyzed The result, indicated that, most of the spelling errors are intra lingual spelling errors in their writing