NameData
Name file · Boy · SSA 1880–2024
Jo
Jo is a boy's name.
● Holding steadyThe Baby Boomers
1,846
Total named
56
Avg ageestimated
1960
Peak year
#7,236
Rank in 2024
Jo peaked in 1960, when about 40 boys were given the name. Today it ranks 7,236th for boys, holding steady. Most people named Jo today are around 56 years old (estimated) — squarely the Baby Boomers. In all, roughly 1,846 boys have been named Jo since record-keeping began in 1911.

📈 Popularity over time

How many boys were named Jo each year, 1880–2024.
Peak: 196040 boys192019401960198020002020

♀ ♂ A shared name

Jo is given to both girls and boys. Among everyone with this name:
99% girls
1% boys

↔ Names from the same era

Other boys' names that peaked around the same time as Jo:
LannieNeillRondalDerylRayfieldRobbin
Data: U.S. Social Security Administration (public domain), 1880–2024. Average age is estimated from a survival curve, not actuarial tables.
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How we read a name

Every figure on this page comes from the U.S. Social Security Administration's public-domain record of names given to babies born in the United States from 1880 to 2024. The SSA only counts a name in a year if at least five babies received it.

Popularity & rank

The trajectory shows how many boys were named Jo each year. The peak year is simply the year that count was highest, and the rank is where the name sat among all boys' names in 2024.

Estimated average age

We estimate the typical age of living people with this name by combining how many were born each year with a rough survival curve. It's a useful approximation for "how old does this name feel," not a precise actuarial figure — that's why we always label it estimated.

For general informational and entertainment purposes only. Counts reflect U.S. SSA card applications and may differ from total births. Figures are rounded.