| Election Name: | 1978 Illinois gubernatorial election |
| Country: | Illinois |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1976 Illinois gubernatorial election |
| Previous Year: | 1976 |
| Next Election: | 1982 Illinois gubernatorial election |
| Next Year: | 1982 |
| Election Date: | November 7, 1978 |
| Image1: | File:Governor James Thompson (3x4).jpg |
| Nominee1: | James R. Thompson |
| Party1: | Republican Party (United States) |
| Running Mate1: | Dave O'Neal |
| Popular Vote1: | 1,859,684 |
| Percentage1: | 59.04% |
| Nominee2: | Michael Bakalis |
| Party2: | Democratic Party (United States) |
| Running Mate2: | Dick Durbin |
| Popular Vote2: | 1,263,134 |
| Percentage2: | 40.10% |
| Map Size: | 300px |
| Governor | |
| Before Election: | James R. Thompson |
| Before Party: | Republican Party (United States) |
| After Election: | James R. Thompson |
| After Party: | Republican Party (United States) |
| Turnout: | 54.23% 19.95 pp |
The 1978 Illinois gubernatorial election was held on Tuesday, November 7, 1978.[1] Republican James R. Thompson easily won a second term in office, defeating Democratic nominee Michael Bakalis by nearly 600,000 votes.
This was the first Illinois gubernatorial election that took place during the United States' midterm elections.[2] The previous election had been in 1976.
The primary (held March 21) and general election coincided with those for federal offices (Senate and House) and those for other state offices.[1] The election was part of the 1978 Illinois elections.
Turnout in the primaries saw 20.39% in the gubernatorial primaries, with a total of 1,201,603 votes cast, and 16.33% in the lieutenant gubernatorial primary, with 962,288 votes cast.[3]
Turnout during the general election was 54.23%, with 3,150,107 votes cast.[1]
Incumbent Illinois Comptroller Michael Bakalis won the Democratic primary.
Bakalis' opponent had been Dakin Williams, a prosecutor who was the younger brother of famous playwright Tennessee Williams.[4] Williams had been a candidate for the Democratic nomination of Illinois' US Senate seat in 1972, and had unsuccessfully sought the nomination for the state's other US Senate seat in 1974.[5]
Lawyer and future congressman and U.S. Senator Dick Durbin won the Democratic primary for lieutenant governor, running unopposed.
Incumbent governor James R. Thompson won renomination, running unopposed.
Incumbent lieutenant governor Dave O'Neal won renomination, running unopposed.