Census Day Bounced Around, and So Did Some Ancestors

From 1950 Census of Population: Vol. 2 (https://www.census.gov/library/publications/1953/dec/population-vol-02.html)

In 2020, Census Day will be April 1st. This is not April Fool!

But Census Day hasn't always been April 1st. I try to keep this in mind when looking for my ancestors in earlier Census years.

• As shown in the excerpt above, Census Day was originally not a fixed date but taken on the first Monday in August.
• In the mid-19th century, Census Day was changed to June 1.
• In 1910, Census Day became April 15.
• In 1920, Census Day became January 1.
• Only in 1930 was Census Day fixed as April 1, where it remains.

Because my great-grandpa Meyer Mahler died in January of 1910, my great-grandma Tillie Jacobs Mahler was enumerated as a widow on April 15th--a vital clue I needed to find his death cert. If Census Day had been January 1, however, it would have been more difficult for me to narrow down a possible death date for him.

Focus on 1950 Census

As the excerpt indicates, two-thirds of the US population was counted by mid-April in 1950. By month's end, 90% of the population was counted.

However, "unfavorable weather conditions" in some areas delayed enumeration as late as mid-May. Finally, by the end of June, 99% of the US population was counted. I'll be sure to check the enumeration date on each ancestor's record when the 1950 Census is released in April of 2022.

From a broader perspective, the 1950 Census reflected major post-war trends in population shifts. The map above shows that four states experienced population loss. All others increased population--with the greatest growth on the West Coast, plus Florida, Virginia, and Michigan.

As I chart my ancestors' whereabouts in the 1940s to prep for the 1950 release, I need to consider how many might have moved elsewhere after World War II. There are at least a few who went west to California. Dear ancestors, you can run, but you can't hide. I hope!

For more posts about the 1950 US Census, see my summary page here.