Karlen is a very rare variant of Karolyn that was most common in the 1990s and has all but disappeared.
Karlen is predominantly a girl name. It last appears in U.S. records in 2015. Karlen first appears in 1940 and peaked in 1992 (10 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2015 | 5 | 5 | #17,787 | — |
| 2013 | 5 | 5 | — | #13,110 |
| 2009 | 10 | 10 | #18,711 | #13,495 |
| 2004 | 7 | 7 | #13,443 | — |
| 2002 | 6 | 6 | #14,482 | — |
| 2001 | 5 | 5 | #16,599 | — |
| 1998 | 8 | 8 | #10,594 | — |
| 1996 | 5 | — | #14,566 | — |
| 1992 | 10 | — | #8,382 | — |
| 1991 | 6 | — | — | #7,762 |
| 1987 | 5 | — | #12,159 | — |
| 1986 | 5 | — | #11,757 | — |
| 1984 | 5 | — | #11,173 | — |
| 1976 | 6 | — | #8,598 | — |
| 1970 | 6 | — | #7,469 | — |
| 1963 | 7 | — | #5,578 | — |
| 1962 | 5 | — | #7,015 | — |
| 1961 | 8 | — | #5,073 | — |
| 1959 | 5 | — | #6,708 | — |
| 1958 | 5 | — | #6,513 | — |
| 1956 | 7 | — | #5,057 | — |
| 1955 | 7 | — | #4,947 | — |
| 1953 | 8 | — | #4,399 | — |
| 1944 | 5 | — | #4,903 | — |
| 1943 | 7 | — | #3,999 | — |
| 1940 | 5 | — | #4,701 | — |