Fredericksburg, TX has a population of 10,997 and is the 3,667th largest city in the United States. The population density is 1,271 per sq mi which is 1211% higher than the Texas average and 1303% higher than the national average. The median age in Fredericksburg is 49 which is approximately 44% higher than the Texas average of 34. In Fredericksburg, 64% of the population over 15 years of age are married, 77% speak English and 19% speak Spanish. 66% of Fredericksburg residents were born in Texas, 24% were born out of state, 0% were born outside of the United States and 10% were foreign born.