| Election Name: | 1940 United States Senate election in Maryland |
| Country: | Maryland |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1934 United States Senate election in Maryland |
| Previous Year: | 1934 |
| Next Election: | 1946 United States Senate election in Maryland |
| Next Year: | 1946 |
| Election Date: | November 5, 1940 |
| Image1: | Georgelpradcliffe.jpg |
| Nominee1: | George L. P. Radcliffe |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 394,239 |
| Percentage1: | 64.74% |
| Party2: | Republican Party (US) |
| Map Size: | 275px |
| Popular Vote2: | 203,912 |
| Percentage2: | 33.48% |
| U.S. Senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
The 1940 United States Senate election in Maryland was held on November 5, 1940.
Incumbent Democratic Senator George L. P. Radcliffe was re-elected to a second term in office, fending off an intra-party challenge from businessman Howard Bruce and easily winning the general election over Republican ex-Governor Harry Nice.
| George L. P. RadcliffeDemocratic | Harry NiceRepublican | Edwin B. AbbottSocialist | David L. ElliottIndependent | OthersOthers | Margin | Totalvotes cast | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % | % | % | % | % | % | ||||||||||||||||
| Allegany | 17122 | 53.94% | 14250 | 44.89% | 99 | 0.31% | 64 | 0.20% | 208 | 0.66% | -2872 | -9.05% | 31743 | ||||||||
| Anne Arundel | 14154 | 65.80% | 7132 | 33.15% | 40 | 0.19% | 103 | 0.48% | 83 | 0.39% | 7022 | 32.64% | 21512 | ||||||||
| Baltimore (City) | 195025 | 69.03% | 81165 | 28.73% | 3158 | 1.12% | 1699 | 0.60% | 1495 | 0.53% | 113860 | 40.30% | 282542 | ||||||||
| Baltimore (County) | 37787 | 68.63% | 16247 | 29.51% | 236 | 0.43% | 595 | 0.43% | 195 | 0.35% | 21540 | 39.12% | 55060 | ||||||||
| Calvert | 2133 | 52.73% | 1867 | 46.16% | 8 | 0.20% | 16 | 0.40% | 21 | 0.52% | -266 | -6.58% | 4045 | ||||||||
| Caroline | 3544 | 58.72% | 2431 | 40.28% | 12 | 0.20% | 16 | 0.27% | 32 | 0.53% | 1113 | 18.44% | 6035 | ||||||||
| Carroll | 6835 | 50.83% | 6471 | 48.12% | 21 | 0.16% | 76 | 0.57% | 45 | 0.33% | 364 | 2.71% | 13448 | ||||||||
| Cecil | 3170 | 35.80% | 5553 | 62.71% | 24 | 0.27% | 56 | 0.63% | 52 | 0.59% | -2383 | -26.91% | 8855 | ||||||||
| Charles | 2472 | 49.08% | 2482 | 49.28% | 22 | 0.44% | 19 | 0.38% | 42 | 0.83% | -10 | -0.20% | 5037 | ||||||||
| Dorchester | 5979 | 62.78% | 3416 | 35.87% | 21 | 0.22% | 45 | 0.47% | 62 | 0.65% | -2563 | -26.91% | 9523 | ||||||||
| Frederick | 12451 | 59.50% | 8190 | 39.14% | 37 | 0.18% | 117 | 0.56% | 131 | 0.63% | 4261 | 20.36% | 20926 | ||||||||
| Garrett | 2746 | 40.63% | 3916 | 57.95% | 31 | 0.46% | 21 | 0.31% | 44 | 0.65% | -1170 | -17.31% | 6758 | ||||||||
| Harford | 6616 | 58.57% | 4539 | 40.18% | 26 | 0.23% | 54 | 0.48% | 61 | 0.54% | 2077 | 18.39% | 11296 | ||||||||
| Howard | 4464 | 65.79% | 2252 | 33.19% | 9 | 0.13% | 30 | 0.44% | 30 | 0.44% | 2212 | 32.60% | 6785 | ||||||||
| Kent | 3395 | 61.94% | 2035 | 37.13% | 2 | 0.04% | 25 | 0.46% | 24 | 0.44% | 1360 | 24.81% | 5481 | ||||||||
| Montgomery | 17834 | 61.98% | 10389 | 36.11% | 292 | 1.01% | 122 | 0.42% | 135 | 0.47% | 7445 | 25.88% | 28772 | ||||||||
| Prince George's | 16731 | 67.07% | 7927 | 31.78% | 52 | 0.21% | 106 | 0.42% | 130 | 0.52% | 8804 | 35.29% | 24946 | ||||||||
| Queen Anne's | 3791 | 64.80% | 1979 | 33.83% | 11 | 0.19% | 24 | 0.41% | 45 | 0.77% | 1812 | 30.97% | 5850 | ||||||||
| St. Mary's | 2620 | 58.30% | 1806 | 40.19% | 11 | 0.24% | 20 | 0.45% | 37 | 0.82% | -814 | -18.11% | 4494 | ||||||||
| Somerset | 3756 | 49.14% | 3768 | 49.29% | 15 | 0.20% | 28 | 0.37% | 77 | 1.01% | 12 | 0.16% | 7644 | ||||||||
| Talbot | 4225 | 54.45% | 3451 | 44.48% | 7 | 0.09% | 22 | 0.28% | 54 | 0.70% | 774 | 9.98% | 7759 | ||||||||
| Washington | 14311 | 60.35% | 9184 | 38.73% | 38 | 0.16% | 97 | 0.41% | 85 | 0.36% | 5127 | 21.62% | 23715 | ||||||||
| Wicomico | 7050 | 65.64% | 3590 | 33.43% | 14 | 0.13% | 35 | 0.33% | 51 | 0.47% | 3460 | 32.22% | 10740 | ||||||||
| Worcester | 3635 | 60.77% | 2238 | 37.41% | 18 | 0.30% | 33 | 0.55% | 58 | 0.97% | 1397 | 23.35% | 5982 | ||||||||
| Total | 385343 | 63.28% | 212781 | 34.94% | 4204 | 0.69% | 3423 | 0.56% | 3197 | 0.53% | 172562 | 28.34% | 608948 | ||||||||