Abstract: Poultry industry in Nigeria is a very vital sector of the country`s economy. It is a sector that could serve as a major source of animal protein for the citizens if certain limitations to her effectiveness are removed with effective advisory services. The study examined the effect of agricultural extension services on the production of poultry farmers in Ondo State south western Nigeria. Specifically it identified new production technology being introduced by extension personnel to the farmers, determined the effect of extension activities on respondents poultry management practices and output among others. Eighty poultry farmers were randomly selected and interviewed using interview schedule to obtain primary data. Descriptive statistics and Pearson Product Moment correlation technique were used to analyse the data Results showed that most of the poultry farmers (32.50%) were in the middle age 46-57 years with about 90% of them having formal education. The respondents were mostly small scale farmers as 65% of them had less than 1000 birds. Some of the improved technologies being introduced to the farmers include use of improved breeding stock, improved housing management technique, Nutritional management, vaccination and disease prevention strategy poultry waste recycling with effective record keeping technique. Results showed that there is a significant relationship between extension visitation and poultry management practices of the respondents. Five percent of the respondents asserted that extension visitation improved their farm record keeping which enhanced effective planning and waste control while 76.6% asserted that extension activities has improved their farm output. Agricultural Extension services if effectively and efficiently managed could serve as a s veritable tool for transformation of poultry sector in Nigeria.