How Many People Are Named Sidney?
An estimated 57,897 people in the United States have the first name Sidney. It is used for both genders, with 77.3% male. The average bearer is 46 years old, and Sidney peaked in popularity in 1918 with 1,939 births that year.
Below you will find a full statistical profile of Sidney as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Sidney paired with any surname.
Estimated Living Americans
57,897
About 1 in 5,920 people in the U.S.
Rarity
Uncommon
Predicted Gender
Male
77.3% confidence
Average Age
46
years old
Peak Year
1918
1,939 births
Total Registered
108,736
since 1880
Gender Distribution for Sidney
Sidney is a genuinely unisex name, used for both males (77.3%) and females (22.7%). Out of 108,736 total births registered, 84,056 were male and 24,680 were female.
Sidney as a male name
Ranked #1,374 in 2024
137 male births in 2024
Peak: 1918 (1,879 births)
Sidney as a female name
Ranked #1,734 in 2024
117 female births in 2024
Peak: 2000 (1,221 births)
Sidney: Popularity Over Time
SSA records for Sidney span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 1920s, when 14,769 babies were registered. Sidney has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Sidney by Decade
How has Sidney tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
| Decade | Total | Male | Female | |
|---|---|---|---|---|
| 1880s | 1,619 | 1,505 | 114 | |
| 1890s | 1,782 | 1,612 | 170 | |
| 1900s | 2,178 | 1,981 | 197 | |
| 1910s | 13,231 | 12,793 | 438 | |
| 1920s | 14,769 | 14,201 | 568 | |
| 1930s | 10,117 | 9,420 | 697 | |
| 1940s | 10,560 | 9,609 | 951 | |
| 1950s | 10,525 | 9,633 | 892 | |
| 1960s | 7,414 | 6,843 | 571 | |
| 1970s | 4,145 | 3,818 | 327 | |
| 1980s | 4,114 | 3,333 | 781 | |
| 1990s | 10,792 | 3,828 | 6,964 | |
| 2000s | 11,130 | 2,729 | 8,401 | |
| 2010s | 4,884 | 1,990 | 2,894 | |
| 2020s | 1,476 | 761 | 715 | |
Sidney by State
Birth registrations for Sidney span all 51 states and territories in the SSA database. The highest counts are in New York, Texas, California. The lowest are in Wyoming, Delaware, Alaska. On average, about 1,837 Sidneys were registered per state.
Sidney + Last Name Combinations
How many people share a full name with Sidney as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Sidney
Other first names starting with S with a similar number of bearers.
Sidney: Questions and Answers
How many people in the U.S. are named Sidney?
We estimate approximately 57,897 people named Sidney are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 5,920 Americans share this first name.
Is Sidney a common name?
Sidney is classified as "Uncommon" and is more popular than 99.2% of all first names in the SSA database. A total of 108,736 births have been registered with this name since 1880.
When was Sidney most popular?
Sidney reached peak popularity in 1918, when 1,939 babies were given this name. The average age of a living person named Sidney is approximately 46 years old, reflecting when the name was most commonly given.
Is Sidney a male name?
Sidney is predominantly male. 77.3% of people with this name are male. See the gender breakdown above for full details.
How many Sidney Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Sidney Smith, Sidney Johnson, Sidney Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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