The name Marykay appears to have been quite popular from the late 1940s until the mid-1960s, with over 500 births recorded during this period alone. The peak years were 1957 (23 births) and 1961 (72 births), but it was consistently among the top choices from 1945 to 1965. After that, its popularity declined sharply, with fewer than 20 births per year from 1966 onwards. Even so, it remains a notable name, with occasional spikes in usage, such as in 2017 and 2023 (each with 8 births). In total, there have been 930 recorded births named Marykay since 1940.