The average net worth for U.S. families is $748,800. The median — a more representative measure — is $121,700. ... Average net worth by age. Age of head of familyMedian net worthAverage net worth 35-44$91,300$436,200 45-54$168,600$833,200 55-64$212,500$1,175,900 65-74$266,400$1,217,700 2 more rows