Introduction. In the spring of 2023, WHO officially proclaimed the end of the pandemic of the new coronavirus infection COVID-19. Despite this, the infectious disease continues to have a negative impact on the body: the attention of the researchers is focused on the increased frequency of hyperglycemia in the post-covid period in patients of older age groups. Purpose of the study: compare the median age of individuals within age groups in the pre-Covid and post-Covid periods, taking into account exceeding the threshold glucose value. Materials and methods. The study was conducted on the basis of data from the laboratory information system of the St. Petersburg State Budgetary Healthcare Institution “City Multidisciplinary Hospital №2”. An age assessment was carried out on 2,100 people in the pre-Covid period and 2,100 people in the post-Covid period, whose blood glucose concentration was examined. The sample included only persons of certain age categories (according to WHO): middle-aged, elderly and senile. Persons of each age category in one or another period of the study were divided into two groups according to blood glucose levels (≤ 6.1 mmol/l and > 6.1 mmol/l). Results. Quantitative structural characteristics of age values show an increase in the number of people with elevated blood glucose concentrations in the post-Covid period across all age categories. In groups of people with blood glucose concentrations within the reference interval, an increase in the median age was observed in people of the middle age category, and a decrease in the indicator in elderly people. In people with elevated blood glucose levels in the post-Covid period, a decrease in median age was recorded in the elderly and senile age categories. Discussion. The identified decreases in median age values (in the group with glucose levels > 6.1 mmol/l) indicate an increase in the number of younger people with hyperglycemia within a particular age category in the post-Covid period. The presence of hyperglycemia that arose during the COVID-19 pandemic may play a major role in the formulated patterns. Conclusion. The study results revealed an increase in the incidence of hyperglycemia in the post-Covid period among middle-aged, elderly and senile people. Analysis of the data showed that in the post-Covid period the number of people with hyperglycemia of younger age within the age range of the elderly and senile age categories increased. Hyperglycemia contributed significantly to lower median age in the post-Covid period than its absence.