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Boy's name · #4 in the US (2025) · Comeback
Theodore was #30 in 1904, slipped to #314 by 1999, and reached #4 in 2024 and has held it since. About 317,000 boys have carried it since 1880. In all that time it has never once missed a year of the national records.
US births of Theodore rose from 252 in 1899 to 834 in 1904, as Theodore Roosevelt went from governor of New York to president.
See where Theodore is more common.
Appears in 2020-2025 birth records of 51 states, the #1 boy's name in 1 of them. See the full state-by-state map on this page.
Theodore is especially popular in Australia (NSW), Australia (QLD), and Australia (VIC).
#3 in Australia (NSW) (2025) · #3 in Australia (QLD) (2025) · #5 in Australia (VIC) (2025) · #5 in New Zealand (2025) · #9 in England & Wales (2025) · #39 in Scotland (2025) · #41 in N. Ireland (2025) · #44 in Ireland (2025) · #115 in Sweden (2025) · #205 in Belgium (2025) · #207 in France (2025) · #252 in Poland (2025) and 4 more.
Among 1,944 notable people named Theodore:
Lawyers & judges appear 2.13× more often than among typical names — e.g. Theodore Balsamon, Byzantine legal scholar and Greek-Orthodox patriarch of Antioch.
About 3,800 boys a year are given Theo as their full name and 230 Teddy.
Similar names: Theo · Leo · Oliver · Jack · Elias · Levi
Browse more boy names — popularity, trends and eras for 5,700+ American names, free.