USA > South Dakota > Aurora County > 1940 Census of Cooper in Aurora County
| A Surnames | B Surnames | C Surnames | D Surnames | E Surnames | G Surnames | H Surnames | J Surnames | L Surnames | M Surnames | N Surnames | P Surnames | R Surnames | S Surnames |
| Anderson | Fred | born about 1907 |
| Anderson | Martin | born about 1902 |
| Atkinson | Harold | born about 1916 |
| Atkinson | Harold M | born about 1916 |
| Atkinson | Myrthe | born about 1922 |
| Atkinson | Myrtle | born about 1922 |
| Becker | George J | born about 1898 |
| Bradwish | Arthur | born about 1912 |
| Bradwish | Elnora | born about 1915 |
| Bradwish | Vivian | born about 1936 |
| Bradwish | Yvonnyoe | born about 1937 |
| Bushold | Mamie | born about 1910 |
| Bushold | Pauline | born about 1875 |
| Closson | Cal E | born about 1897 |
| Closson | Lula M | born about 1906 |
| Cool | Carry | born about 1866 |
| Dahlenburg | Anna | born about 1886 |
| Dahlenburg | Dale | born about 1924 |
| Dahlenburg | John | born about 1926 |
| Doering | Alferd J | born about 1912 |
| Doering | Alice L | born about 1937 |
| Doering | Art | born about 1881 |
| Doering | Elizebth M | born about 1883 |
| Doering | Laura M | born about 1916 |
| Doering | William | born about 1910 |
| Eindzer | Albert | born about 1891 |
| Eindzer | Alberta M | born about 1923 |
| Eindzer | Eearl E | born about 1920 |
| Eindzer | Nadine R | born about 1934 |
| Eindzer | Rosena M | born about 1895 |
| Eindzer | Vance A | born about 1919 |
| Guindon | Ada M | born about 1927 |
| Guindon | Clifferd E | born about 1931 |
| Guindon | Fenne E | born about 1928 |
| Guindon | Gladys M | born about 1934 |
| Guindon | John W | born about 1883 |
| Guindon | Johnna Lee | born about 1939 |
| Guindon | Pearl M | born about 1903 |
| Guindon | Vada M | born about 1926 |
| Hardhouse | Mary M | born about 1852 |
| Hawkins | John A | born about 1920 |
| Jones | Hilda M | born about 1910 |
| Jones | Richard K | born about 1910 |
| Jones | Terrance G | born about 1938 |
| Jumper | Kenneth G | born about 1925 |
| Jumper | Merle F | born about 1903 |
| Larson | Ada L | born about 1921 |
| Larson | Dave W | born about 1918 |
| Lenocker | Clarence | born about 1869 |
| Lenocker | Earl | born about 1894 |
| Merkamp | Agnes | born about 1887 |
| Merkamp | Karline M | born about 1919 |
| Merkamp | William M | born about 1883 |
| Meskamp | Garrett | born about 1885 |
| Mettel | Anna | born about 1872 |
| Mettel | Dan | born about 1905 |
| Niles | Andrew L | born about 1911 |
| Niles | Earl V | born about 1880 |
| Niles | Minnie | born about 1878 |
| Paldine | Grace | born about 1892 |
| Paldine | Velva M | born about 1928 |
| Pol | Sophie | born about 1908 |
| Reeves | Billie J | born about 1925 |
| Reeves | Donald B | born about 1927 |
| Reeves | George T | born about 1880 |
| Reeves | Luella F | born about 1896 |
| Reeves | Winfred E | born about 1912 |
| Scott | Arvid P | born about 1929 |
| Scott | Doras A | born about 1931 |
| Scott | Doris E | born about 1902 |
| Scott | Phullis A | born about 1925 |
| Scott | Roger W | born about 1936 |
| Scott | Theodore D | born about 1899 |
| Sergfried | Joe | born about 1862 |
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