Boys name · Illinois
William in Illinois
William was the 14th most popular boys name in Illinois in 2025, with 334 babies named William that year. Since 1910, Illinois families have named 201,081 babies William.
Popularity over time
William in Illinois, year by year
| Year | Babies | State rank |
|---|---|---|
| 1910 | 422 | 2nd |
| 1926 | 2,983 | 3rd |
| 1943 | 3,044 | 5th |
| 1959 | 2,884 | 7th |
| 1976 | 1,139 | 13th |
| 1992 | 903 | 23rd |
| 2009 | 693 | 8th |
| 2025 | 334 | 14th |
Its rank among boys names in Illinois fell from 2nd in 1910 to 14th in 2025.
The most babies named William in Illinois in a single year was 3,679, in 1947. Its best showing was 2nd among boys names in 1910.
Across the country, William reached its best rank of #1 in North Carolina (1998). See William in every state →
How popular is William in Illinois?
William was the 14th most popular boys name in Illinois in 2025, with 334 babies named William that year. Since 1910, Illinois families have named 201,081 babies William.
How many babies are named William in Illinois?
In 2025, 334 babies were named William in Illinois. The most babies named William in Illinois in a single year was 3,679, in 1947.
What is the rank of William in Illinois?
William ranked 14th among boys names in Illinois in 2025. Its best showing was 2nd among boys names in 1910.
Source: U.S. Social Security Administration, names by state of birth (public domain). Counts below 5 in a state-year are omitted by the SSA for privacy.