In Pakistan, pneumonia is a leading cause of death among children less than five years. Antibiotics’ limited efficacy in reducing pneumonia-related pediatric deaths may be due to viral respiratory infections. This study aimed to determine the incidence of eight viruses and their subtypes associated with severe pneumonia in under five children in a community in Karachi, Pakistan. It was conducted from November 2011 to July 2013 in a community in Bin Qasim Town Karachi, Pakistan. Under five children, who met the criteria for Lower Respiratory Tract Infection (LRTI) were enrolled. Nasal and throat swabs of confirmed pneumonia cases were performed for viral diagnosis. The incidence of all LRTI episodes and viral-specific LRTI episodes was determined. A total of 646 study participants were enrolled, out of which 53% were male. The overall incidence of pneumonia in this cohort was 26.4 (21.98-30.82) episodes per 100 child-year of follow-up. The most frequently detected viruses were enterovirus/rhinovirus at 62.6% (n=57), followed by RSV at 14.2% (n=13) and Para influenza virus type III at 6.5% (n=6.). 17.5% (n=24) of the nasopharyngeal swabs that were positive revealed co-infection. This study could be useful in exploring prevention strategies in community settings to reduce respiratory infections among children.