Over the past 110 years, 329 587 girls and 230 boys have been named Tammy. The name Tammy ranks 107th in the United States among the most common names for girls. For the first time more than ten times newborns were named Tammy in 1943. The peak of popularity of the name Tammy came in the 1960s and 1970s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.