Meaning and history
Millie is a diminutive form of Mildred, Millicent, and other names with the same sound.
20062006: 135 births, rank #1,590
2007: 151 births, rank #1,526
2008: 261 births, rank #1,011
2009: 323 births, rank #861
2010: 311 births, rank #861
20112011: 330 births, rank #812
2012: 385 births, rank #721
2013: 481 births, rank #592
2014: 618 births, rank #507
2015: 682 births, rank #469
20162016: 743 births, rank #434
2017: 895 births, rank #353
2018: 1,098 births, rank #304
2019: 1,317 births, rank #240
2020: 1,504 births, rank #190
20212021: 1,697 births, rank #173
2022: 2,197 births, rank #128
2023: 2,564 births, rank #105
2024: 2,920 births, rank #87
20252025: 3,353 births, rank #73
Millie has risen sharply in the modern US rankings, moving from #980 in 1966 to #73 in 2025. It now stands at #73 for girls. That year also produced its highest recorded birth count, at 3,353.