NameCensus.

UK girl's name

Millie

A diminutive form of names like Millicent or Camilla, meaning work or strife.

For 2026, the newest official UK baby-name figures on this page are from 2024. That release is the current official benchmark rather than a forecast.

Millie is a girl's name in the UK records. People looking for Millie popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #27, with 1,255 babies registered with the name. Its strongest year in the published records was 2004, with 2,425 births.

This profile covers 44,390 England and Wales registrations across 29 recorded years from 1996 to 2024. The figures come from ONS England and Wales, NRS Scotland and NISRA Northern Ireland, so the page is a view of published baby-name registrations rather than a forecast or a live count of people using the name today.

The latest count is about 52% of the recorded peak, which gives a quick read on how the name has moved since its high point.

We estimate that about 48,990 living people in the UK are called Millie. This uses published birth registrations from England and Wales, Scotland and Northern Ireland, then applies ONS national life tables to estimate how many are likely still alive. It does not forecast extra births for 2025 or 2026.

Key insights

  • Millie ranked #27 for girls in England and Wales in 2024, with 1,255 registrations.
  • The name peaked in 2004, when 2,425 girls were registered as Millie.
  • Millie ranks best in Scotland in the latest published regional snapshot for that area, where it placed #5 in 2024.
  • About 48,990 living people in the UK are estimated to have Millie as a first name, after adjusting past birth registrations with ONS life tables.

Latest rank (E&W)

#27

2024

Births in 2024

1,255

Latest year

Peak year

2004

2,425 births

Estimated living

48,990

2026

Meaning

What does Millie mean?

Millie is a diminutive form of the feminine given name Millicent, which is derived from the Germanic words "mildi" meaning "gentle" and "centi" meaning "bright" or "brilliant." The name Millicent first emerged in the Middle Ages, around the 12th century, and was particularly popular among the Norman aristocracy in England.

The earliest recorded instances of the name Millie can be traced back to the 13th century, where it appeared as a shortened form of Millicent in various historical documents. One of the earliest notable figures with the name Millie was Millie de Cantilupe, a 13th-century English noblewoman who was a member of the influential Cantilupe family.

In the 16th century, the name Millie gained popularity as a standalone name, rather than just a diminutive. It became particularly fashionable in England and Scotland during this period. One notable Millie from this era was Millie Napier, a Scottish noblewoman who was the wife of Sir Archibald Napier, the 7th Lord Napier (1534-1608).

During the 17th century, the name Millie continued to be used in various parts of Europe, albeit less frequently than in previous centuries. One notable Millie from this time was Millie Gwyn, a renowned English actress and mistress of King Charles II, who lived from 1642 to 1687.

In the 18th century, the name Millie experienced a resurgence in popularity, particularly in the United States. One notable figure with this name was Millie Disosway, an American woman who was captured by Native Americans during the Revolutionary War and later published a captivity narrative in 1788.

In the 19th century, the name Millie remained in use, though it was not among the most popular names of the era. One notable Millie from this period was Millie Christine McKoy, better known as Christine Nilsson, a Swedish operatic soprano who performed extensively in Europe and the United States between 1864 and 1888.

As you can see, the name Millie has a rich history spanning several centuries and cultures, with notable figures bearing this name in various fields, from nobility and acting to literature and music.

Sourced from namecensus.com.

Popularity

Millie over time

The chart below shows babies named Millie registered in England and Wales in the years where the name appears in the published records, from 1996 to 2024. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.

For Millie, the clearest high point is 2004. The latest England and Wales figure is 1,255 births in 2024, compared with 2,425 at the peak.

Babies born per year

Millie
06061K2K2K199620102024

Decades

Millie by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Millie was a short-lived spike or a name that stayed in regular use. Average rank is calculated only from years where a published rank exists.

Decade Average rank Total births Years covered
2020s #26 7,065 5
2010s #33 15,847 10
2000s #29 18,945 10
1990s #89 2,533 4

Geography

Where Millie is most common

The bars show the latest published local birth counts for Millie. They are useful for spotting where the name is showing up in real numbers, while the rank beside each bar shows how strongly it performs inside that region.

Millie ranks best in Scotland in the latest published regional snapshot for that area, where it placed #5 in 2024.

East of England
246
Scotland
222
North East
102
Wales
90
Northern Ireland
13

Across the UK

Millie in Scotland and Northern Ireland

Scotland (NRS)

#5 in 2024

29 years of NRS records, 4,544 total registered

Northern Ireland (NISRA)

#150 in 2024

23 years of NISRA records, 313 total registered

Notable bearers

Famous people named Millie

  • Millie Couzens

    sport cyclist

    British cyclist

    2003-

  • Millie Prior

    basketball player

    college basketball player (2021–2022) Fordham

    2003-

  • Millie Innes

    child actor

    British actress

    2001-

  • Millie B

    rapper; influencer; TikToker

    English rapper and TikToker

    2000-

  • Millie Knight

    alpine skier

    British Paralympic athlete

    1999-

  • Millie Spalding

    acrobatic gymnast

    British gymnast

    1998-

  • Millie Chandarana

    association football player

    English association football player (born 1997)

    1997-

  • Millie Farrow

    association football player

    English association football player

    1996-

Related

Names similar to Millie

FAQ

Millie: questions and answers

How popular is the name Millie in the UK right now?

In 2024, Millie was ranked #27 for girls in England and Wales, with 1,255 births registered.

When was Millie most popular?

The peak year on record was 2004, with 2,425 babies registered as Millie in England and Wales.

What is the meaning and origin of Millie?

A diminutive form of names like Millicent or Camilla, meaning work or strife.

How many people are called Millie in the UK?

A total of 44,390 babies have been registered as Millie across the 29 years of ONS England & Wales records shown here, plus 4,544 more in Scotland and 313 in Northern Ireland.

Where is Millie most common?

In the latest published local rankings, Millie ranks best in Scotland, where it placed #5 in 2024. The regional bars on this page use birth counts, so they also reflect the size of each region.

Which records is this page based on?

The England and Wales timeline uses ONS baby-name records. Scotland figures come from NRS and Northern Ireland figures come from NISRA. Counts are registrations in published baby-name files. The living estimate uses those birth registrations with ONS national life tables.