Girls' name · peaked in 1966

Jill name popularity since 1925

208,437 babies born in the US from 1925 to 2025 were named Jill. Half of them were born in 1967 or earlier, so the typical Jill is about 59 years old in 2026. Jill peaked in 1966 as the #49 name for girls, and it was outside the top 1,000 in 2025.

US babies since 1925: 208,437; Named Jill, 1925–2025
Peak year: 1966; #49 for girls that year
Typical age: About 59; Median birth year 1967
In 2025: Not top 1,000; #5,810 for girls in 2025
Girls / boys: 99.8% girls; 207,936 girls · 501 boys
Most popular in: Iowa; 2.30× its national share

Peak year is the year Jill made up the largest share of US girls, in records going back to 1880. Typical age is based on births from 1925 on, not on who is living today.

Jill births per year, 1925–2025

1966 was the biggest year for Jill both by count and as a share of all babies.

Fastest rise: Between 1937 and 1942, Jill became 2.8× more common, from 1 in 5,780 baby girls to 1 in 2,040.
Steepest fall: Between 1985 and 1990, its share of baby girls fell by 63%, from 1 in 844 to 1 in 2,270.

Shaded on the chart. Both compare Jill's share of all US girls five years apart, counting only years with at least 100 babies named Jill.

Decade by decade

Babies named Jill in each decade, and its rank among girls' names in the middle year of the decade (1935, 1945 … 2025).

Decade	Girls	Boys	Rank
1925–29	179	0	–
1930s	1,578	0	#523
1940s	11,865	25	#177
1950s	39,061	64	#102
1960s	69,144	166	#51
1970s	55,070	175	#46
1980s	24,407	71	#143
1990s	4,748	0	#565
2000s	1,335	0	#1,747
2010s	425	0	#4,030
2020–25	124	0	#5,810

Ranks count every name given to at least 5 girls that year, so they can go past 1,000.

Generation fingerprint

46.6% of babies named Jill from 1925 to 2025 were born in the Gen X years (1965–1980). The full split by generation:

Where Jill is most popular

The index compares Jill's share of babies in each state with its share nationwide, 1925–2025 (1.50× = 50% more common). States with at least 300 babies named Jill.

State	Index	Babies
Iowa	2.30×	6,065
Minnesota	2.17×	8,242
Wisconsin	2.14×	8,743
South Dakota	2.07×	1,368
Nebraska	1.89×	2,754

Names with a similar story

Of the other 499 names on this site, these six had the share of babies closest in shape to Jill's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Jill.

Names from the same era

Other common names that peaked within two years of Jill (1966).

Source: U.S. Social Security Administration national and state baby-name data, which covers names given to at least 5 babies of one sex in a year. About the data