Q . What happened to the 1890 census? Everyone seems to skip over it when talking about census records.

A. The 1890 census is a bit of a sore subject for genealogists. Bringing it up sparks bad dreams, anguished “if only”s and anxieties over everlasting brick walls.

Why?

More than 99 percent of the records were destroyed Jan. 10, 1921, in a fire in the basement of the Commerce Building.

When the fire broke out, firefighters flooded the basement with water. The flames didn’t spread to upper floors, but the 1890 census records—piled outside a records storage vault—were soaked. (Even some of the census schedules stored inside the supposedly waterproof vault got wet.)

The cause of the blaze couldn’t be determined.

The records sat in storage for awhile, with no restoration efforts made. Rumors circulated that they’d be disposed of; various groups protesting such measures were assured the rumors were unfounded. But sometime between 1933 and 1935, the records were destroyed along with other papers the Census Bureau deemed no longer necessary.

I almost don’t want to tell you how future genealogists almost dodged this bullet: According to a 1996 article in the National Archives’ Prologue magazine  (vol. 28, no. 1), all or part of 1790 through 1880 census schedules had to be filed in county clerks' offices. But this wasn’t required in 1890; all the  schedules were forwarded to Washington, DC.

Fragments of the 1890 census bearing 6,160 names later turned up, and are viewable on microfilm. Also surviving are special 1890 schedules for half of Kentucky and states alphabetically following it, which enumerate Union veterans and their widows.

In a precursor to the 1921 tragedy, an 1896 fire badly damaged 1890 special schedules including mortality, crime, pauperism and “special classes.” They were destroyed by Department of the Interior order.

For help filling the genealogical holes left by the 1890 census, see our article on FamilyTreeMagazine.com.