boys' name 2013–2025

Theo

Theo is making a comeback — from #134 in 2013 to #36 in 2025.

+ sibling names →
#36 ranked in 2025
484 registrations in 2025
2,679 total 2013–2025

Popularity over the years

That's a jump of 98 positions. Registrations grew from 7 to 484 (+6814%).

Peak popularity: 2025 (484 registrations, ranked #36).

010020030040050020132017202020222025peak
Peak 2025 · 484
Low 2013 · 7
Years tracked 12

Neighbours in the 2025 ranking

Names with similar popularity. If you're considering Theo, you might also like these:

By state & territory — 2025

How often Theo was registered in each of the 8 Australian states and territories.

Theo popularity by state — 2025Australian Capital Territory: no data for this yearNew South Wales: 177 (rank #32)Northern Territory: no data for this yearQueensland: 144 (rank #27)South Australia: 33 (rank #47)Tasmania: no data for this yearVictoria: 130 (rank #50)Western Australia: no data for this yearACTNSWNTQLDSATASVICWA
Theo — popularity by state & territory in 2025. Hover a state for details, click to view the full Top 50 for that state.
Show full data table

Most popular in New South Wales (177 babies) , least popular in South Australia (33).

New South Wales
177 #32
Queensland
144 #27
Victoria
130 #50
South Australia
33 #47
Australian Capital Territory
Northern Territory
Tasmania
Western Australia

In 2025: 484 babies named Theo across 4 of 8 states and territories.

Frequently asked questions

How many babies in Australia have been named Theo?
Between 2013 and 2025, Theo was registered for 2,679 babies in the available state datasets.
Is Theo a popular name in Australia?
In 2025, Theo ranked #36 among boys' names in Australia, with 484 registrations.