Integrated functional adult literacy provides learners to acquire knowledge and skills useful to their daily live. Now a day, the focus has been shifted to illiterate adult who due to a number of reasons is out of formal education. Our country has been aggressively doing in functional adult education since 2006. In light of this, this research was aimed at assessing the effectiveness of integrated functional adult literacy in Wolaita and Dawuro Zones. It was also intended to identify how effectively the program coordinated, how relevant to and benefit adult learners, and the challenges that hamper the implementation of the program. Consequently, it also suggests a way out of the problems evidenced in the study. To conduct the study a descriptive survey method was used. Samples of 2 woredas, 24 adult learners, 24 facilitators 8 school leaders, 4 supervisors, 6 department /sector heads, 2 woreda adult education unit were selected by simple random and purposive sampling techniques as data sources. To answer the basic questions, data were collected from groups of sample respondents through questionnaires, interview and document analysis. The data were analyzed using descriptive statistical technique such as percentages. The results of the study revealed that the program was relevant, practical and beneficial to the adult learners. However, almost all adult education facilitators were poorly qualified in terms of schooling and received inadequate training on andragogy. Thus, the training for facilitators and the preparation of more literacy materials in addition to current materials in locale language are among recommendations.