Morphometric data for the US is found in the Third National Health and Nutrition Examination Survey (NHANES III).

Many countries like Brazil and Mexico are notorious for their lack of adequate statistical norms for physique. Malnutrition and the worldwide advance of obesity promote interest in anthropometry.
The process of getting mortality data by locality is just coming of age. See also "Pesos y estatura en ninos Mexicanos" at
http://www.pitt.edu/~super1/lecture/lec20311/index.htm

and “Heights and Weights of Mexican Children.” http://www.pitt.edu/~super1/lecture/lec17651/index.htm