In 2025, 445 US boys were named Sincere, making it the 631st most common boys’ name of the year, down 28 places from #603 in 2024. That is 30 fewer than the 475 boys named Sincere in 2024. Its best rank for boys was #544, reached in 2022. That year also had the most boys given the name: 545. For comparison, it was #628 in 2015 and unranked in 1950.
In 2025, 44 US girls were named Sincere, making it the 3,510th most common girls’ name of the year, up 594 places from #4,104 in 2024. That is 8 more than the 36 girls named Sincere in 2024. Its best rank for girls was #2,164, reached in 2010. That year also had the most girls given the name: 91. For comparison, it was #3,054 in 2015 and unranked in 1950.
Social Security card records list Sincere in 36 years of the 146 from 1880 to 2025, starting in 1976 with 5 babies. In all, 11,567 US babies have been given the name, 13% of them girls and 87% boys. Its busiest decade was the 2010s, with 4,715 babies named Sincere.
Over the 10 years from 2016 to 2025, 4,668 US boys were named Sincere; the busiest of those years was 2022, with 545. In 2025 that was about 1 in 3,838 of the boys in SSA’s list for the year.
Among the states, Sincere ranked highest in District of Columbia in 2025, at #166 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Syncere (3,808 babies since 1880). Rarer spellings such as Cincere, Cyncere and Sencere are summarised on this page.