McDonough, GA has a population of 23,086 and is the 1,888th largest city in the United States. The population density is 1,831 per sq mi which is 997% higher than the Georgia average and 1920% higher than the national average. The median age in McDonough is 33 which is approximately 8% lower than the Georgia average of 36. In McDonough, 47% of the population over 15 years of age are married, 90% speak English and 6% speak Spanish. 49% of McDonough residents were born in Georgia, 41% were born out of state, 2% were born outside of the United States and 8% were foreign born.