NameTides

Theo

Theo was the #82 boys' name in the US in 2025 (3,945 babies), and #12 in England & Wales and #15 in Canada.

Theo as a boy’s name

  • US
  • England & Wales
  • Scotland
  • Northern Ireland
  • Ireland
  • Canada
  • NSW
  • VIC
Theo as a boy’s name, US, England & Wales, Scotland, Northern Ireland, Ireland, Canada, NSW, VICBabies per 1,000 in the published list, 1880–2025, for US, England & Wales, Scotland, Northern Ireland, Ireland, Canada. Gaps mark years with too few babies to be published.0510152018801900192019401960198020002020Northern IrelandScotlandEngland & WalesIrelandCanadaUS
Theo as a boy’s name, US, England & Wales, Scotland, Northern Ireland, Ireland, Canada, NSW, VICBabies per 1,000 in the published list, 1880–2025, for US, England & Wales, Scotland, Northern Ireland, Ireland, Canada. Gaps mark years with too few babies to be published.051015201880192019602000
Babies per 1,000 of the same sex in each published list. New South Wales and Victoria publish their top 100 only, so they appear in the rank view and only in years the name made the top 100. Breaks in a line are years with too few babies to be published.
Show the numbers
YearUSEngland & WalesScotlandNorthern IrelandIrelandCanadaNSWVIC
2025#82 (3,945)#12 (2,398)#6 (243)#7 (106)#21 (189)#15 (953)#32 (177)#50 (130)
2024#80 (4,129)#12 (2,387)#4 (270)#5 (125)#13 (252)#17 (901)#38 (164)#71 (106)
2023#78 (4,140)#11 (2,489)#8 (238)#9 (108)#17 (233)#17 (903)#44 (166)#69 (92)
2022#98 (3,642)#9 (2,808)#9 (243)#4 (132)#21 (232)#17 (938)#40 (173)#83 (85)
2021#142 (2,703)#15 (2,514)#14 (219)#6 (119)#24 (210)#23 (884)#69 (134)—
2020#172 (2,225)#17 (2,598)#14 (232)#7 (112)#34 (157)#30 (764)#86 (104)—
2019#195 (2,018)#16 (2,729)#16 (218)#13 (111)#48 (142)#33 (711)#100 (94)—
2018#243 (1,554)#19 (2,741)#27 (177)#18 (100)#62 (104)#42 (631)——
2017#290 (1,232)#21 (2,616)#28 (187)#48 (62)#73 (97)#52 (614)——
2016#354 (952)#29 (2,279)#45 (140)#45 (67)#106 (64)#58 (587)——
2015#405 (765)#33 (2,103)#69 (106)#54 (58)#117 (59)#62 (539)——
2014#509 (550)#37 (2,008)#84 (85)#62 (48)#123 (56)#88 (427)——
2013#663 (365)#41 (1,759)#99 (66)#88 (36)#152 (42)#85 (448)——
2012#790 (287)#44 (1,629)#121 (52)#147 (18)#176 (38)#94 (420)——
2011#863 (245)#50 (1,407)#108 (61)#143 (19)#196 (32)#87 (446)——

The tide so far

  • Peaked in the US in 2023 at #78.
  • Rising over the last five years.
  • In the US records since the data begins in 1880.

How common is it?

about 1 in 430 baby boys in the published US list for 2025.

In a group of 1,000 children born that year, you would expect to meet about 2. How we work this out.

How common, country by country

WhereSexLatest yearShareVerdict
USBoys2025about 1 in 430common
England & WalesBoys2025about 1 in 110very common
ScotlandBoys2025about 1 in 81very common
Northern IrelandBoys2025about 1 in 78very common
IrelandBoys2025about 1 in 130very common
CanadaBoys2025about 1 in 170very common

Next year

On its recent trend, Theo is likely to keep rising in the US in 2026: about 1 in 350 baby boys. Likely range 1 in 270 to 1 in 460.

Estimate, not an official figure. How we estimate.

Across the US

Theo by state, 2025Alaska: #94AKMaine: #82MEWisconsin: #61WIVermont: fewer than 5 babiesVTNew Hampshire: #94NHWashington: #71WAIdaho: #76IDMontana: #127MTNorth Dakota: #77NDMinnesota: #106MNIllinois: #70ILMichigan: #81MINew York: #63NYMassachusetts: #41MAOregon: #73ORNevada: #92NVWyoming: fewer than 5 babiesWYSouth Dakota: #77SDIowa: #57IAIndiana: #69INOhio: #88OHPennsylvania: #74PANew Jersey: #66NJConnecticut: #51CTRhode Island: #97RICalifornia: #76CAUtah: #49UTColorado: #84CONebraska: #136NEMissouri: #89MOKentucky: #105KYWest Virginia: #127WVVirginia: #112VAMaryland: #83MDDelaware: #82DEArizona: #115AZNew Mexico: #134NMKansas: #124KSArkansas: #151ARTennessee: #118TNNorth Carolina: #91NCSouth Carolina: #120SCDistrict of Columbia: #55DCOklahoma: #78OKLouisiana: #127LAMississippi: #201MSAlabama: #223ALGeorgia: #124GAHawaii: #26HITexas: #124TXFlorida: #76FL
Theo (boys) rank in each state, 2025. Hatched states recorded fewer than 5 babies.
  • #1–10
  • #11–50
  • #51–100
  • #101–500
  • below #500

Across Canada

ProvinceYearRankBabies
Quebec2025#9397
Ontario2024#33251

Theo (boys): rank in each province’s latest list. Only Quebec and Ontario publish full name lists; Ontario’s latest list is a year behind.

Spellings

Official statistics count each spelling separately, so we show them side by side rather than adding them up.

SpellingWhereSexLatest rankBabies
TheoCanadaGirls#3,4785
TheoCanadaBoys#15953
TheoEngland & WalesGirls—too few
TheoEngland & WalesBoys#122,398
TheoIrelandBoys#21189
ThéoIrelandBoys#5096
TheoNorthern IrelandBoys#7106
TheoNSWBoys#32177
TheoScotlandBoys#6243
TheoUSGirls#5,72221
TheoUSBoys#823,945
TheoVICBoys#50130