INTRODUCCION: Hasta ahora existen pocos estudios sobre las caracteristicas clinicas de la poblacion pediatrica con neumonia por COVID-19. El objetivo de este estudio fue analizar los datos que se asocian con el desarrollo de neumonia en ninos y adolescentes con infeccion por SARS-CoV-2 en Mexico. METODOS: Se llevo a cabo un analisis secundario de la base de datos de la Direccion General de Epidemiologia del Gobierno Mexicano. Se incluyeron menores de 19 anos con infeccion por SARS-CoV-2 confirmada mediante la prueba de retrotranscripcion acoplada a la reaccion en cadena de la polimerasa (RT-PCR). La variable dependiente fue el diagnostico de neumonia. Se calcularon las razones de momios (RM) y los intervalos de confianza del 95% (IC95%). Se realizaron modelos de regresion logistica multiple para ajustar los factores asociados a neumonia. RESULTADOS: Se incluyeron 1443 ninos con diagnostico de COVID-19. La mediana de edad de los participantes fue de 12 anos (rango intercuartilar 25-75: 5-16). La neumonia se presento en 141 ninos (9.8%). Los principales factores de riesgo fueron edad < 3 anos (RM: 3.5; IC95%: 2.45-5.03), diabetes u obesidad (RM: 12.6; IC95%: 4.62-34.91) e inmunocompromiso (RM: 7.03; IC95%: 3.97-13.61). CONCLUSIONES: Los ninos con COVID-19 menores de 3 anos y con comorbilidad, especialmente diabetes u obesidad, y los inmunocomprometidos presentan mayor riesgo de desarrollar neumonia. BACKGROUND: Currently, there are a few studies on the clinical characteristics of the pediatric population with COVID-19 and pneumonia. This study aimed to analyze data associated with the development of pneumonia in children and adolescents with SARS-CoV-2 infection throughout Mexico. METHODS: We conducted a secondary analysis of the database of the Direccion General de Epidemiologia of the Mexican Government. We included children under the age of 19 who were confirmed with SARS-CoV-2 infection by reverse transcription-polymerase chain reaction (RT-PCR) test. The dependent variable was the diagnosis of pneumonia. Odds ratios (OR) and 95% confidence intervals (95% CI) were calculated. Multiple logistic regression models were performed to adjust factors associated with pneumonia. RESULTS: A total of 1443 children with a COVID-19 diagnosis were included. The median age of the participants was 12 years (interquartile range 25, 75: 5, 16). Pneumonia occurred in 141 children (9.8%). The main risk factors were age < 3 years (OR, 3.5; 95%CI, 2.45-5.03); diabetes or obesity (OR, 12.6; 95%CI, 4.62-34.91); and immunocompromise (OR, 7.03; 95%CI, 3.97-13.61). CONCLUSIONS: Children < 3 years with COVID-19 and comorbidities, especially diabetes or obesity, and immunocompromised patients have a higher risk of developing pneumonia.