This study investigated awareness of climate change and sustainable development among undergraduates in two universities: University of Ibadan, Ibadan and Ladoke Akintola University of Technology, Ogbomoso in Oyo State of Nigeria. This was aimed at increasing the knowledge of undergraduates on climate change and sustainable development. The study adopted a survey design. The population for the study consisted of 300 hundred undergraduates in University of Ibadan, Ibadan and Ladoke Akintola University of Technology, Ogbomoso in Oyo State, Nigeria. The students were selected using purposively random sampling technique. A 45-item each with Likert type response format titled ''Awareness of Climate Change and Sustainable Development among Undergraduates Students'' tagged ACCSDUS were administered. Data obtained were analyzed using simple percentages and t-test. The results showed that undergraduates possessed high level of awareness on the concept of climate change, have access to the sources of information and factors of personal experience, public sources and education greatly influence their awareness. The results further showed that there was no significant difference in the level of climate change and sustainable development awareness in term of gender (t = 0.733 > 0.05). There is a significant difference in the level of awareness of undergraduates on the concept of climate change based on school ownership (t = 0.013 < 0.05). The study concluded that climate change education should be structured and embedded in the curricula of schools at all levels and that training, re-training, empowerment or enlightenment of the public and stakeholders in climate change should be carried out without bias, discrimination or marginalization of any form.