Incumbent senators are listed as well as elected senators and runner(s)-up in each election, including major third-party candidates (garnering 5% or more of the popular vote).
Parties are color-coded to the left of a Senator's or candidate's name according to the key below.
The popular vote and percentage margins listed in the "Margin" column are the differences between the total votes received and percentage of the popular vote received by the top two finishers in the corresponding election (i.e. the margin-of-victory of an elected Senator over the nearest competitor).
Independent Democratic Republican Prohibition Progressive Party (1924) Progressive Party (1912) Note: Asterisk (*) next to year denotes a special election.
Note: Asterisk (*) next to year denotes a special election.