Millie cat name
We found 429 cats named Millie in the public pet registers of 10 places. Combining all places, Millie is the #98 cat name. Almost all cats named Millie are female.
🐶 Millie is also a popular dog name (#40 for dogs, 3,811 dogs).
Millie as a cat name, by place
| Place | Rank | Cats | Years |
|---|---|---|---|
| South Australia Australia | #18 in top 100 | 373 | 2025 |
| Toronto Canada | #78 of 7,094 | 28 | 2019 |
| Seattle United States | #98 of 6,020 | 14 | 2026 |
| Vancouver Canada | #244 of 2,134 | 2 | 1999–2026 |
| Laval Canada | #453 of 1,862 | 1 | 2023–2026 |
| Tacoma United States | #119 of 1,390 | 2 | 2021 |
| Richmond United States | #55 of 915 | 2 | 2018 |
| Golden Plains Shire Australia | #47 of 727 | 3 | 2016 |
| Corangamite Shire Australia | #62 of 667 | 2 | 2023 |
| Surf Coast Shire Australia | #57 of 603 | 2 | 2016 |
Rank among all names in that place's register ("in top N" where only a top list is published). "Per 10,000" is how many of every 10,000 registered cats there are named Millie. Click a column to sort. See data sources.
Millie over the years
Cats named Millie per 10,000 cats, by the year of registration or licence (varies by place). Hover a bar for the number.
Millie as a baby name
Millie was the #73 girls' name in the US in 2025 (3,353 babies). Elsewhere it ranks #7 for girls in Scotland, #13 for girls in Wales, #16 for girls in New Zealand and #36 for girls in England and Wales. See Millie as a baby name on MixedName, including which languages use it.
Similar cat names
Cat names ranked near Millie
Top cat names · All cat names starting with M · Millie as a dog name