AimsThis study investigated how the economic crisis has changed Sri Lankans' food consumption. MethodsA web-based cross-sectional survey was carried out in the month of July 2022, using an e-questionnaire based on Google Forms. The questionnaire assessed respondents' socio-demographics, food consumption, and dietary patterns before and during the economic crisis. The changes were compared using descriptive statistics and inferential statistics. ResultsA total of 1095 respondents, aged ≥18 years were included in the survey. There was a significant reduction in the average consumption of main meals per day during the economic crisis (pre: 3.09 ± 0.42, post: 2.82 ± 0.47; P < 0.001). The intake of food items such as rice, bread, and snacks also reduced significantly (P < 0.001). The average daily milk intake frequency decreased from 1.41 ± 1.07 to 0.57 ± 0.80 meals/day (P < 0.001). On contrary, the intake of non-dairy beverages such as malted milk and “plain tea” has increased by several folds. Consumption of fruit and vegetables showed a significant reduction in both frequency and portion size. The consumption of meat, fish, eggs and dhal also decreased in around three-quarters of the study sample. During this period majority (81%) used food coping mechanisms and the most adopted strategy was buying less expensive food. ConclusionSri Lankans' food consumption have been adversely altered due to the country's economic crisis. There has been an overall reduction in the amount and frequency of intake of many common food items.