The study examined the perception and constraints of extension practitioners on utilization of communication technologies in southwestern Nigeria. This was necessitated by the need to ensure a practicable, vibrant, and efficient extension service delivery in the study area. 124 public and 41 non-public extension practitioners were selected through a three staged sampling procedure. Questionnaires were used to elicit vital information on their perceptions on ICT use, constraints faced during ICT use and other components. These were analyzed using descriptive statistics, mean difference, PPMC, and independent sample t-test. The results showed that (61.0%) of respondents from non-public organizations fell within those with favorable perception level. Also, (64.50%) of respondents had high level of constraints to ICT access. Moreover, (58.10%) of respondents from the public organizations' encountered high level of constraint to ICT use. Result showed that respondents from the public extension organizations were more constrained in access to (14.10 ± 3.17) and use of ICT tools (10.84 ± 3.30) and were significant. The study has implications for providing functional ICT tools to the respondents for effective extension delivery. Agricultural extension service organizations should organize more frequent in-house trainings on the benefits of ICT use in relation to their extension work.