“The average American man is 5-feet, 9-inches tall and weighs 198 pounds; an average woman is 5-feet, 4-inches and 171 pounds, based on CDC data. That compares with 189.1 pounds and 163.6, respectively, at the start of the century.” The bad news: The Average American Is Edging Closer to Being Obese. The good news: We all have a great diet and exercise plan that kicks in on January 1.