| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,227 | 3,811 | 5,136 | |
| 2020 | R | 1,376 | 3,841 | 5,351 | |
| 2016 | R | 1,243 | 3,350 | 4,881 | |
| 2012 | R | 1,927 | 2,711 | 4,760 | |
| 2008 | R | 2,677 | 2,690 | 5,441 | |
| 2004 | R | 1,903 | 3,447 | 5,380 | |
| 2000 | R | 2,103 | 2,699 | 4,893 | |
| 1996 | D | 2,335 | 2,070 | 5,130 | |
| 1992 | R | 2,088 | 2,347 | 5,778 | |
| 1988 | R | 2,253 | 3,336 | 5,608 | |
| 1984 | R | 2,395 | 3,787 | 6,230 | |
| 1980 | R | 2,431 | 3,168 | 5,962 | |
| 1976 | D | 3,174 | 2,886 | 6,120 | |
| 1972 | R | 2,311 | 3,876 | 6,219 | |
| 1968 | R | 2,898 | 3,052 | 6,504 | |
| 1964 | D | 4,210 | 2,552 | 6,829 | |
| 1960 | R | 3,228 | 3,738 | 7,009 | |
| 1956 | R | 3,152 | 3,855 | 7,071 | |
| 1952 | R | 3,144 | 3,759 | 7,066 | |
| 1948 | D | 3,611 | 2,840 | 6,641 | |
| 1944 | D | 3,207 | 3,079 | 6,439 | |
| 1940 | D | 4,095 | 3,352 | 7,530 | |
| 1936 | D | 4,217 | 2,845 | 7,145 | |
| 1932 | D | 4,088 | 2,890 | 7,130 | |
| 1928 | R | 2,576 | 3,882 | 6,541 | |
| 1924 | R | 3,094 | 3,553 | 6,953 | |
| 1920 | R | 2,555 | 3,145 | 6,073 | |
| 1916 | D | 1,867 | 1,595 | 3,706 | |
| 1912 | D | 1,651 | 399 | 3,624 | |
| 1908 | D | 2,214 | 1,835 | 4,258 | |
| 1904 | R | 2,058 | 2,521 | 4,906 | |
| 1900 | D | 2,191 | 2,121 | 4,489 | |
| 1896 | D | 2,272 | 2,154 | 4,501 | |
| 1892 | D | 1,340 | 1,203 | 2,935 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Blackford County's roughly 14,000 residents have delivered lopsided Republican presidential margins for more than a decade, reflecting a broader rural northeast Indiana pattern where manufacturing decline and demographic homogeneity reinforce low electoral competitiveness.
The Democratic margin in Blackford County peaked at thirty-five points in 1912. By 2000 the county had flipped, voting Republican for the first time in many years. The 2024 margin was fifty points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Blackford County's median household income of $51,326 sits well below state and national norms, and 16% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Jay County and Stark County.