From a researcher named John Parman:
I’ve always wondered whether cowboys from Texas really did tend to be tall, or whether somebody just made up the phrase “tall Texan” because it’s alliterative and catchy.
Here’s a graph showing height of WWII inductees by county. Solid red is 5′-10″ or taller, solid yellow is 5’7″ or smaller.
Apparently, in the 1940s, Texas men, outside of the Hispanic Rio Grande Valley, really were the most consistently tall in the U.S.
Is this ancestral? Due to drinking lots of milk and eating lots of beef?