- Milo P. Humlicek
 - Bernhard Olligschläger
 Death - 21 January 1921 - Erftstadt-Ahrem, Nordrhein-Westfalen, Deutschland - Lester Ray Race
 Birth - 1 March 1921 - Orchard, Antelope County, Nebraska, United States of America - Charles George Sabata
 Birth - 21 April 1921 - David City, Butler County, Nebraska, United States of America - Raymond Rolland (Ray) Hartman
 Birth - 11 May 1921 - Hadar, Pierce County, Nebraska, United States of America - Marjory Mildred Svoboda
 Birth - 13 May 1921 - Prague, Saunders County, Nebraska, United States of America - Lawrence C. Raaen
 - Richard Franklin Coleman
 Birth - 27 May 1921 - Denver, Denver County, Colorado, United States of America - Wesley (or Vaclav) Mishka
 Death - June 1921 - Phoenix, Maricopa County, Arizona, United States of America - Margaret Fitzgerald
 - Heinrich Johann Jakob Vogt
 Birth - 6 July 1921 - Kranenburg, Nordrhein-Westfalen, Deutschland - Maria van Baal
 Birth - 19 July 1921 - Kranenburg-Wyler, Nordrhein-Westfalen, Deutschland - Henry M. Kuncl
 Birth - 28 July 1921 - Prague, Saunders County, Nebraska, United States of America - Mary Alice Svoboda
 Birth - 28 July 1921 - Schuyler, Colfax County, Nebraska, United States of America - Leonard Humlicek
 - Clara Catherine (Kay) Roberts
 Birth - 7 August 1921 - Liberty, Maricopa County, Arizona, United States of America - Clara Pearl Ragains
 Birth - 9 August 1921 - Choctaw, Oklahoma County, Oklahoma, United States of America - Willemina Hendrika Nikkelen
 - Joseph C. (Josef) (Joe) Tuma
 Death - 29 August 1921 - Burwell, Garfield County, Nebraska, United States of America - Almeda Lolita Mayer
 - William Clarence Harlow Halsey
 - Alfred Barovick
 - Vern Tuma
 Birth - 18 September 1921 - south of Chadron, Dawes County, Nebraska, United States of America - Wayne Acey Tuma
 Birth - 13 November 1921 - just east of Chadron, Dawes County, Nebraska, United States of America - Pearl Victoria Chmelka
 - Virginia E. Lach
 Birth - 28 December 1921 - New Britain, Hartford County, Connecticut, United States of America
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