There were 233 800 000 Facebook users in United States of America in April 2020, which accounted for 69.6% of its entire population.. The majority of them were women - 54.1%.. People aged 25 to 34 were the largest user group (63 000 000).. The highest difference between men and women occurs within people aged 65 and above, where women lead by 6 200 000.