U.S. Senator
"Bill" Cassidy (Republican) won with 55.9% of the vote.
"Bill" Cassidy RepublicanElected
55.9% 712,379 votes
Mary L. Landrieu DemocratDefeated
44.1% 561,210 votes
Who got the most votes in each parish, and their share
| Under 50% | 50 to 60% | Over 60% | |
|---|---|---|---|
| "Bill" Cassidy | |||
| Mary L. Landrieu |
1,273,589 votes cast; 43.6% of the 2,945,731 registered voters in the area turned out.
Results by parish
| Parish | "Bill" Cassidy | Mary L. Landrieu | Turnout |
|---|---|---|---|
| Acadia Parish | 73.7%13,290 | 26.3%4,751 | 46.4% |
| Allen Parish | 69.0%3,646 | 31.0%1,640 | 38.0% |
| Ascension Parish | 64.0%20,534 | 36.0%11,575 | 44.2% |
| Assumption Parish | 49.3%3,292 | 50.7%3,380 | 44.7% |
| Avoyelles Parish | 62.7%7,406 | 37.3%4,411 | 48.0% |
| Beauregard Parish | 79.1%6,878 | 20.9%1,817 | 39.8% |
| Bienville Parish | 48.7%2,357 | 51.3%2,487 | 51.1% |
| Bossier Parish | 73.0%20,691 | 27.0%7,637 | 40.0% |
| Caddo Parish | 45.8%31,952 | 54.2%37,813 | 42.1% |
| Calcasieu Parish | 63.1%30,511 | 36.9%17,870 | 38.5% |
| Caldwell Parish | 74.8%2,291 | 25.2%772 | 46.9% |
| Cameron Parish | 79.4%1,545 | 20.6%402 | 37.2% |
| Catahoula Parish | 65.9%2,158 | 34.1%1,119 | 48.1% |
| Claiborne Parish | 53.7%2,503 | 46.3%2,157 | 52.1% |
| Concordia Parish | 57.5%3,083 | 42.5%2,278 | 40.2% |
| De Soto Parish | 54.0%4,591 | 46.0%3,917 | 47.2% |
| East Baton Rouge Parish | 47.3%62,118 | 52.7%69,271 | 46.7% |
| East Carroll Parish | 32.7%913 | 67.3%1,876 | 53.4% |
| East Feliciana Parish | 50.2%3,653 | 49.8%3,630 | 53.5% |
| Evangeline Parish | 60.7%6,336 | 39.3%4,101 | 47.1% |
| Franklin Parish | 69.1%4,509 | 30.9%2,014 | 48.0% |
| Grant Parish | 82.6%4,398 | 17.4%927 | 42.2% |
| Iberia Parish | 62.5%12,738 | 37.5%7,652 | 42.9% |
| Iberville Parish | 41.6%5,378 | 58.4%7,537 | 60.2% |
| Jackson Parish | 62.3%3,264 | 37.7%1,977 | 51.7% |
| Jefferson Davis Parish | 71.0%5,781 | 29.0%2,359 | 39.3% |
| Jefferson Parish | 53.0%58,179 | 47.0%51,536 | 41.6% |
| Lafayette Parish | 67.7%42,537 | 32.3%20,297 | 42.4% |
| Lafourche Parish | 64.0%14,876 | 36.0%8,360 | 41.1% |
| LaSalle Parish | 87.9%3,763 | 12.1%520 | 50.1% |
| Lincoln Parish | 59.6%7,187 | 40.4%4,874 | 44.3% |
| Livingston Parish | 83.0%27,212 | 17.0%5,587 | 41.5% |
| Madison Parish | 39.9%1,244 | 60.1%1,872 | 40.8% |
| Morehouse Parish | 52.6%4,338 | 47.4%3,914 | 43.4% |
| Natchitoches Parish | 55.1%5,674 | 44.9%4,617 | 40.8% |
| Orleans Parish | 15.1%15,590 | 84.9%87,441 | 41.1% |
| Ouachita Parish | 62.0%26,799 | 38.0%16,420 | 42.0% |
| Plaquemines Parish | 56.6%4,342 | 43.4%3,331 | 50.0% |
| Pointe Coupee Parish | 48.0%3,824 | 52.0%4,143 | 51.0% |
| Rapides Parish | 65.4%25,123 | 34.6%13,266 | 46.2% |
| Red River Parish | 50.7%1,423 | 49.3%1,381 | 45.4% |
| Richland Parish | 62.5%4,442 | 37.5%2,667 | 51.7% |
| Sabine Parish | 78.5%4,838 | 21.5%1,327 | 42.1% |
| St. Bernard Parish | 49.4%4,636 | 50.6%4,758 | 37.1% |
| St. Charles Parish | 57.2%9,059 | 42.8%6,787 | 45.9% |
| St. Helena Parish | 37.6%1,610 | 62.4%2,676 | 51.3% |
| St. James Parish | 35.6%2,919 | 64.4%5,281 | 52.0% |
| St. John the Baptist Parish | 31.0%4,031 | 69.0%8,955 | 43.8% |
| St. Landry Parish | 49.3%13,616 | 50.7%13,990 | 46.1% |
| St. Martin Parish | 60.4%9,817 | 39.6%6,431 | 45.0% |
| St. Mary Parish | 57.2%7,773 | 42.8%5,812 | 40.9% |
| St. Tammany Parish | 71.8%54,915 | 28.2%21,595 | 47.3% |
| Tangipahoa Parish | 60.8%19,149 | 39.2%12,323 | 42.2% |
| Tensas Parish | 45.0%796 | 55.0%971 | 45.2% |
| Terrebonne Parish | 63.8%16,732 | 36.2%9,491 | 41.7% |
| Union Parish | 71.4%4,965 | 28.6%1,988 | 45.2% |
| Vermilion Parish | 75.9%11,201 | 24.1%3,559 | 39.6% |
| Vernon Parish | 80.3%7,854 | 19.7%1,923 | 41.3% |
| Washington Parish | 59.3%7,144 | 40.7%4,903 | 44.6% |
| Webster Parish | 59.3%7,126 | 40.7%4,885 | 47.1% |
| West Baton Rouge Parish | 51.0%4,314 | 49.0%4,148 | 51.6% |
| West Carroll Parish | 80.6%2,422 | 19.4%582 | 41.3% |
| West Feliciana Parish | 53.7%2,231 | 46.3%1,927 | 54.8% |
| Winn Parish | 68.7%2,862 | 31.3%1,302 | 45.1% |