Iain is an uncommon variant of Ian that peaked in 2003 and has since faded.
Iain is a boy name. In 2025 it ranked #7,357 for boy births in the United States (and #15,461 across all names), given to 11 babies. Iain was first reported in SSA data in 1953 and peaked in 2003 (126 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 11 | 11 | #7,357 |
| 2024 | 25 | 25 | #4,244 |
| 2023 | 24 | 24 | #4,387 |
| 2022 | 27 | 27 | #4,029 |
| 2021 | 23 | 23 | #4,420 |
| 2020 | 45 | 45 | #2,740 |
| 2019 | 43 | 43 | #2,873 |
| 2018 | 38 | 38 | #3,067 |
| 2017 | 35 | 35 | #3,269 |
| 2016 | 44 | 44 | #2,740 |
| 2015 | 50 | 50 | #2,501 |
| 2014 | 59 | 59 | #2,261 |
| 2013 | 48 | 48 | #2,545 |
| 2012 | 69 | 69 | #2,020 |
| 2011 | 69 | 69 | #1,991 |
| 2010 | 67 | 67 | #2,046 |
| 2009 | 95 | 95 | #1,658 |
| 2008 | 79 | 79 | #1,847 |
| 2007 | 85 | 85 | #1,750 |
| 2006 | 90 | 90 | #1,607 |
| 2005 | 106 | 106 | #1,405 |
| 2004 | 124 | 124 | #1,226 |
| 2003 | 126 | 126 | #1,181 |
| 2002 | 113 | 113 | #1,218 |
| 2001 | 98 | 98 | #1,329 |
| 2000 | 95 | 95 | #1,344 |
| 1999 | 92 | 92 | #1,313 |
| 1998 | 74 | 74 | #1,491 |
| 1997 | 76 | — | #1,429 |
| 1996 | 86 | — | #1,281 |
| 1995 | 63 | — | #1,519 |
| 1994 | 52 | — | #1,723 |
| 1993 | 44 | — | #1,880 |
| 1992 | 56 | — | #1,587 |
| 1991 | 46 | — | #1,752 |
| 1990 | 29 | — | #2,397 |
| 1989 | 37 | — | #1,964 |
| 1988 | 33 | — | #1,965 |
| 1987 | 49 | — | #1,472 |
| 1986 | 34 | — | #1,808 |
| 1985 | 29 | — | #1,987 |
| 1984 | 33 | — | #1,741 |
| 1983 | 35 | — | #1,670 |
| 1982 | 32 | — | #1,790 |
| 1981 | 22 | — | #2,289 |
| 1980 | 16 | — | #2,879 |
| 1979 | 16 | — | #2,825 |
| 1978 | 19 | — | #2,416 |
| 1977 | 19 | — | #2,398 |
| 1976 | 17 | — | #2,545 |
| 1975 | 15 | — | #2,684 |
| 1974 | 16 | — | #2,503 |
| 1973 | 9 | — | #3,551 |
| 1972 | 15 | — | #2,474 |
| 1971 | 12 | — | #2,881 |
| 1970 | 19 | — | #2,088 |
| 1969 | 22 | — | #1,785 |
| 1968 | 15 | — | #2,144 |
| 1967 | 8 | — | #3,096 |
| 1966 | 7 | — | #3,361 |
| 1965 | 14 | — | #2,216 |
| 1964 | 15 | — | #2,155 |
| 1963 | 8 | — | #3,168 |
| 1962 | 5 | — | #4,305 |
| 1961 | 10 | — | #2,786 |
| 1960 | 8 | — | #3,193 |
| 1957 | 5 | — | #4,236 |
| 1956 | 5 | — | #4,183 |
| 1953 | 6 | — | #3,597 |