See main article: 1950 United States Senate elections.
| Election Name: | 1950 United States Senate election in Maryland |
| Country: | Maryland |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1944 United States Senate election in Maryland |
| Previous Year: | 1944 |
| Next Election: | 1956 United States Senate election in Maryland |
| Next Year: | 1956 |
| Election Date: | November 7, 1950 |
| Image1: | Johnmbutler.jpg |
| Nominee1: | John Marshall Butler |
| Party1: | Republican Party (US) |
| Popular Vote1: | 326,291 |
| Percentage1: | 53.00% |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 283,180 |
| Percentage2: | 46.00% |
| Map Size: | 275px |
| U.S. Senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Republican Party (US) |
The 1950 United States Senate election in Maryland was held on November 7, 1950. Incumbent Democratic U.S. Senator Millard Tydings ran for a fifth term in office, but was defeated by Republican John Marshall Butler.
Although Markey received more raw votes than Butler, Butler received the highest unit vote at the State Convention and was nominated for Senate.
| John Marshall ButlerRepublican | Millard TydingsDemocratic | Samuel FoxProgressive | Margin | TotalVotes Cast | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % | % | % | % | ||||||||||
| Allegany | 16379 | 60.54% | 10399 | 38.44% | 278 | 1.03% | 5980 | 22.10% | 27056 | ||||
| Anne Arundel | 13935 | 57.86% | 9934 | 41.25% | 213 | 0.88% | 4001 | 16.61% | 24082 | ||||
| Baltimore (City) | 127968 | 53.01% | 110262 | 45.67% | 3195 | 1.32% | 17706 | 7.33% | 241425 | ||||
| Baltimore (County) | 42419 | 51.59% | 39346 | 47.86% | 452 | 0.55% | 3073 | 3.74% | 82217 | ||||
| Calvert | 1942 | 45.66% | 2285 | 53.73% | 26 | 0.61% | -343 | -8.06% | 4253 | ||||
| Caroline | 2627 | 45.68% | 3101 | 53.92% | 23 | 0.40% | -474 | -8.24% | 5751 | ||||
| Carroll | 7498 | 57.81% | 5404 | 41.66% | 69 | 0.53% | 2094 | 16.14% | 12971 | ||||
| Cecil | 3727 | 38.85% | 5816 | 60.62% | 51 | 0.53% | -2089 | -21.77% | 9594 | ||||
| Charles | 3493 | 55.43% | 2749 | 43.62% | 60 | 0.95% | 744 | 11.81% | 6302 | ||||
| Dorchester | 4038 | 47.46% | 4433 | 52.10% | 38 | 0.45% | -395 | -4.64% | 8509 | ||||
| Frederick | 10668 | 56.43% | 8112 | 42.91% | 126 | 0.67% | 2556 | 13.52% | 18906 | ||||
| Garrett | 3824 | 63.72% | 2128 | 35.46% | 49 | 0.82% | 1696 | 28.26% | 6001 | ||||
| Harford | 4679 | 36.78% | 8001 | 62.90% | 41 | 0.32% | -3322 | -26.11% | 12721 | ||||
| Howard | 3649 | 48.08% | 3793 | 49.98% | 147 | 1.94% | -144 | -1.90% | 7589 | ||||
| Kent | 2440 | 43.02% | 3217 | 56.72% | 15 | 0.26% | -777 | -13.70% | 5672 | ||||
| Montgomery | 22467 | 54.39% | 18261 | 44.21% | 576 | 1.39% | 4206 | 10.18% | 41304 | ||||
| Prince George's | 20599 | 56.26% | 15675 | 42.81% | 339 | 0.93% | 4924 | 13.45% | 36613 | ||||
| Queen Anne's | 2090 | 41.35% | 2931 | 57.99% | 33 | 0.65% | -841 | -16.64% | 5054 | ||||
| St. Mary's | 3093 | 49.36% | 3115 | 49.71% | 58 | 0.93% | -22 | -0.35% | 6266 | ||||
| Somerset | 3507 | 52.45% | 3138 | 46.93% | 42 | 0.63% | 369 | 5.52% | 6687 | ||||
| Talbot | 3324 | 47.28% | 3678 | 52.31% | 29 | 0.41% | -354 | -5.03% | 7031 | ||||
| Washington | 13445 | 59.08% | 9138 | 40.15% | 175 | 0.77% | 4307 | 18.93% | 22758 | ||||
| Wicomico | 5668 | 52.01% | 5151 | 47.27% | 79 | 0.72% | 517 | 4.74% | 10898 | ||||
| Worcester | 2812 | 47.23% | 3113 | 52.28% | 29 | 0.49% | -301 | -5.06% | 5954 | ||||
| Total | 326291 | 53.00% | 283180 | 46.00% | 6143 | 1.00% | 43111 | 7.00% | 615614 | ||||