In the year 1900, what were the most popular first names given to boy and girl babies born in the United States?

The story behind the answer

U.S. Social Security birth records show that in 1900 the most popular baby names were John for boys and Mary for girls. These reflected the era’s Anglo-American and biblical naming traditions—safe, respectable names often chosen to honor relatives. While William, George, Joseph, Elizabeth, Anne, and Catherine were common, none topped John and Mary that year.

Context: Mary dominated girls’ rankings for decades around 1900, and John led boys until mid-century, before media influence and growing cultural diversity shifted tastes (e.g., Linda, Jennifer, Michael). Memory tip: “John and Mary” are classic placeholder names in grammar and logic examples—plus “Mary had a little lamb.” Pair those cues to remember that John and Mary were the quintessential American baby names in 1900.