Food security in Africa was impacted as a result of supply chain disruptions and government lockdowns brought on by the Coronavirus Disease of 2019 (COVID-19) pandemic. With participation from important actors in the agricultural value chain, the Sasakawa Africa Association (SAA) assessed the effect of COVID-19 on agri-food system in Ethiopia, Mali, Nigeria, and Uganda. Farmers, agro-processors, private service providers, off-takers and merchants, input dealers, and Ministry of Agriculture Extension service personnel are among the value chain actors that took part in the study. The survey, which was held from April 13 to April 16, 2020, used semi-structured tools and questionnaires aimed at the different stakeholders. The study used a cluster sample technique. The data were analyzed using SPSS software, which included frequency counts, percentages, rank correlation, and categorical regression. Based on the severity of the lockdowns associated to COVID-19, the survey found that the outcomes differed by country. The analysis shows a negative association between e-extension and education during the COVID-19 epidemic, but a high and positive correlation (p < 0.01) between extension services and postharvest services, as well as credit availability. Factors such as transportation, labor availability, price fluctuations, output market activity, loan availability, and food and nutrition security were significantly and positively correlated with COVID-19 awareness. Additionally, the respondents indicated that price changes were favourably correlated with labour availability and transportation, and that farming activities were significantly and positively correlated with food and nutrition security, labour availability, and the output market. According to the perspective data collected in every country during the COVID-19 epidemic, postharvest services, agricultural input activities, and food and nutrition security all heavily relied on extension services, with postharvest services having a negative correlation with extension services. The results of the analysis show that COVID-19 impacted several variables that are associated with extension services across the four countries. For instance, the R2 value of the relationship between value chain variables and extension service delivery across Mali (0.485), Nigeria (0.621), Ethiopia (0.426), Uganda (0.529), and the combined countries (0.511) indicates that the variation of the dependent variables can account for 48.5% of the variation in the values of the independent variable (extension service delivery) in Mali, 62.1% in Nigeria, 42.6% in Ethiopia, 52.9% in Uganda, and 51.1% in the combined countries. Farmers' access to agricultural labour, credit services, inputs for agriculture, and output markets was restricted by the ban on travel and social gatherings. Smallholder farmers should employ digital solutions more to strengthen the agricultural value chain's actors' resilience against potential pandemics or conflicts, according to the study's implications for extension services. This will reduce the requirement for extensive personal touch and travel in the delivery of extension services. The study also highlights how crucial it is for extension services to show tangible outcomes and benefits in order to increase farming communities' and value chain actors' resilience in any difficult circumstances. Key words: COVID-19, food systems, extension services, value chain actors, output markets