Introduction: We report an investigation designed to explore the information-seeking behaviour of extension managers and specialists in Iran, and to identify the factors that correlate with this behaviour. Method: A questionnaire was developed to explore information-seeking behaviour of extension managers and specialists. The questionnaire was distributed to thirty-eight public extension managers and 175 public extension specialists who work for Deputy of Extension and Farming System of Iran's Ministry of Agriculture. Analysis: Data collected were analyzed using the statistical package for the social sciences (SPSS). Appropriate statistical procedures for description (frequencies, percent, means, and standard deviations) were used. Results: The main motivation for seeking job-related information by both public extension managers and specialists was interest in developing their own job-related information. The top three mostly used information sources by extension managers and specialists were Persian books, Persian scientific magazines, and scientific-technical reports. Concerning communication channels, interpersonal communication with colleagues, in-service training courses and scientific-technical conventions were ranked respectively as the three top communication channels used by respondents. There was a negative correlation between managers' years of extension work and their information-seeking behaviour. For specialists, a significant positive correlation was found between years of education, level of job satisfaction and information-seeking behaviour. Conclusion: Providing valuable information sources, and removing information seeking barriers, can improve information-seeking behaviour of extension specialists and managers.