The baby name Una appears in baby name data for the United States from 1910 to 2024. It was most popular in 1918 with 218 babies given the name.
In the later years of this period, Una has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 32 |
| 1911 | 29 |
| 1912 | 89 |
| 1913 | 65 |
| 1914 | 125 |
| 1915 | 134 |
| 1916 | 174 |
| 1917 | 140 |
| 1918 | 218 |
| 1919 | 195 |
| 1920 | 174 |
| 1921 | 200 |
| 1922 | 166 |
| 1923 | 112 |
| 1924 | 132 |
| 1925 | 104 |
| 1926 | 121 |
| 1927 | 104 |
| 1928 | 95 |
| 1929 | 69 |
| 1930 | 110 |
| 1931 | 57 |
| 1932 | 79 |
| 1933 | 100 |
| 1934 | 56 |
| 1935 | 82 |
| 1936 | 44 |
| 1937 | 28 |
| 1938 | 76 |
| 1939 | 37 |
| 1940 | 51 |
| 1941 | 10 |
| 1942 | 16 |
| 1943 | 10 |
| 1945 | 10 |
| 1947 | 5 |
| 1948 | 5 |
| 1953 | 5 |
| 1957 | 11 |
| 1958 | 12 |
| 1959 | 10 |
| 1960 | 10 |
| 1961 | 5 |
| 1962 | 11 |
| 1963 | 5 |
| 1964 | 6 |
| 1965 | 8 |
| 1966 | 6 |
| 1968 | 7 |
| 1969 | 10 |
| 1970 | 12 |
| 1971 | 5 |
| 1974 | 5 |
| 1984 | 5 |
| 1995 | 6 |
| 1998 | 5 |
| 2000 | 9 |
| 2005 | 6 |
| 2006 | 6 |
| 2007 | 5 |
| 2008 | 6 |
| 2009 | 8 |
| 2010 | 6 |
| 2011 | 5 |
| 2012 | 5 |
| 2014 | 6 |
| 2015 | 31 |
| 2016 | 42 |
| 2017 | 37 |
| 2018 | 16 |
| 2019 | 20 |
| 2020 | 14 |
| 2021 | 12 |
| 2022 | 28 |
| 2023 | 12 |
| 2024 | 20 |