The Global Status Report for Buildings and Construction (2021) finds that in 2020, the building sector accounted for 36 per cent of global final energy consumption and 37 per cent of energy related CO₂ emissions, as compared to other end use sectors. CO₂ emissions from building operations fell 10 percent in 2020 to around 8.7 gigatons, down from around 9.6 gigatons in 2019, as a result of the shift in building-related energy use patterns. This paper studied the impacts of the COVID-19 pandemic on energy use, and carbon dioxide (CO₂) emissions, for more than one hundred buildings at a major university campus located in a hot and humid climate. The time series of energy consumption on the annual period between March 2019 through February 2020 were compared to the year of March 2020 through February 2021, when the pandemic started. The annual electricity (ELE) uses for the entire campus during the pandemic decreased by approximately 8%, resulting in an avoided annual electricity use of approximately 20,702 MWh, with a cost savings of $1.6 million and a reduction of 17.9 million pounds of CO₂ emissions. The monthly electricity uses for the whole campus decreased by 3% - 18%. electricity use reduction in April and May was much higher than in other months due to the lockdown policy for these two months. For different types of campus buildings, pandemic impacts on energy use varied largely: Office/classroom, general/dining/sport type buildings had high electricity reduction, approximately 10%. The dorm/residence type buildings have the lowest electricity reduction, less than 4%. Eighty-five percent of the total studied buildings showed a reduction during the pandemic start year, and annual electricity use reduction for a single building could be as high as 45%. While the pandemic resulted in an overall reduction in electricity consumption across the building in campus, the impacts on chilled water (CHW) and heating hot water (HHW) consumption were not as clear. The changes in occupancy and schedules during the pandemic should have led to reduced consumption of these energy sources, but to prevent the spread of COVID-19 an increased on the fresh air intake was set in place, which counteract any potential reductions in CHW and HHW consumption.