Grayson, KY has a population of 4,093 and is the 7,344th largest city in the United States. The population density is 1,470 per sq mi which is 1256% higher than the Kentucky average and 1523% higher than the national average. The median age in Grayson is 30 which is approximately 23% lower than the Kentucky average of 39. In Grayson, 43% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 61% of Grayson residents were born in Kentucky, 38% were born out of state, 0% were born outside of the United States and 1% were foreign born.