In 2025, 126 US boys were named Zack, making it the 1,435th most common boys’ name of the year, down 40 places from #1,395 in 2024. That is 9 fewer than the 135 boys named Zack in 2024. Its best rank for boys was #317, reached in 1883. The most boys given the name in a single year was 237, in 2008. For comparison, it was #1,222 in 2015 and #1,219 in 1950.
Social Security card records list Zack in every one of the 146 years from 1880 to 2025; in 1880 there were 19 babies with the name. In all, 9,012 US babies have been given the name, all of them boys. Its busiest decade was the 2000s, with 1,872 babies named Zack.
Over the 10 years from 2016 to 2025, 1,472 US boys were named Zack; the busiest of those years was 2016, with 189. In 2025 that was about 1 in 13,556 of the boys in SSA’s list for the year.
Among the states, Zack ranked highest in New Jersey in 2025, at #705 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Zach (2,804 babies since 1880) and Zac (1,600 babies since 1880). Rarer spellings such as Zak, Zakk and Zayce are summarised on this page. The open nickname list we use links it to Zach and Zak.