1866 Michigan gubernatorial election

{{short description|none}}

{{Use American English|date=January 2025}}

{{Use mdy dates|date=September 2023}}

{{Infobox election

| election_name = 1866 Michigan gubernatorial election

| country = Michigan

| type = Presidential

| ongoing = no

| previous_election = 1864 Michigan gubernatorial election

| previous_year = 1864

| next_election = 1868 Michigan gubernatorial election

| next_year = 1868

| election_date = November 6, 1866

| image1 = File:Governor-crapo-1-.jpg

| image_size = 150x150px

| nominee1 = Henry H. Crapo

| party1 = Republican Party (United States)

| popular_vote1 = 97,112

| percentage1 = 58.59%

| image2 = File:Alpheus S. Williams - cropped.png

| nominee2 = Alpheus S. Williams

| party2 = Democratic Party (United States)

| popular_vote2 = 68,650

| percentage2 = 41.42%

| map_image = 1866 Michigan gubernatorial election results map by county.svg

| map_size = 300px

| map_caption = County results
Crapo: {{legend0|#e27f7f|50–60%}} {{legend0|#d75d5d|60–70%}} {{legend0|#d72f30|70–80%}} {{legend0|#C21B18|80–90%}} {{legend0|#A80000|90–100%}}
Williams: {{legend0|#7996e2|50–60%}} {{legend0|#6674DE|60–70%}} {{legend0|#584CDE|70–80%}}
No Date/Vote: {{legend0|#808080}}

| title = Governor

| before_election = Henry H. Crapo

| before_party = Republican Party (United States)

| after_election = Henry H. Crapo

| after_party = Republican Party (United States)

}}

{{ElectionsMI}}

The 1866 Michigan gubernatorial election was held on November 6, 1866. Incumbent Republican Henry H. Crapo defeated Democratic nominee Alpheus S. Williams with 58.59% of the vote.