Objective: The illness of asthma is quite prevalent all over the globe. Eosinophilia, one of the major factors to be taken into account when choosing treatment protocols for the different forms of asthma, is one of them. Eosinophilia levels in various kinds of asthmatic individuals might vary. We were interested in determining if age may affect the frequency and severity of eosinophilia in asthmatic individuals. The purpose of the current research was to estimate the prevalence of eosinophilia in individuals with bronchial asthma across various age groups. Methods: From October 2022 to March 2023, 116 patients were included in this cross-sectional research at the Mayo Hospital Lahore in Pakistan's Department of Pulmonology. All new instances of bronchial asthma between the ages of 20 and 70 were registered. Spirometry was performed after a thorough medical examination and history were completed. The hospital laboratory tested blood eosinophil counts on each patient, and the results were documented. SPSS v.26 was used to analyze the data. Results: The patients' average age was 41±11.02 years. Patients aged 20 to 40 were 56 (48%) whereas those aged 41 to 70 were 60 (52%). There were 37 women and 79 men, or 68% of the population. 65 kgs±12.73 was the average weight. 39 (34%) patients had no family history of asthma, whereas 77 (66%) patients had a favorable family history. A total of 71 individuals (61%) had eosinophilia, compared to 45 patients (39%) who did not. Across various age and gender groupings, there were no discernible changes in eosinophilia. Conclusions: The majority of people who suffer from bronchial asthma have eosinophilia. Adults of various ages do not significantly vary in their levels of eosinophilia.