The Milam County Courthouse in Cameron, Texas, United States. The courthouse was listed on the National Register of Historic Places on December 20, 1977. – Larry D. Moore, CC BY 4.0 – Wikimedia Commons Milam County is located in Texas. About 24,513 people live here. Between 2010 and 2020, the population declined from 24,757 to 24,754. The area covers about 1,646.0 square kilometers. The region is divided into 5 Municipalities. The region was founded in 1837. Milam County is county in Texas, United States. More information at www.milamcounty.net.