| Election Name: | 1936 United States Senate election in Colorado |
| Country: | Colorado |
| Flag Year: | 1911 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1930 United States Senate election in Colorado |
| Previous Year: | 1930 |
| Next Election: | 1942 United States Senate election in Colorado |
| Next Year: | 1942 |
| Election Date: | November 3, 1936 |
| Image1: | File:Sen. Ed C. Johnson 1937 (cropped).jpg |
| Nominee1: | Ed Johnson |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 299,376 |
| Percentage1: | 63.45% |
| Nominee2: | Ray Sauter |
| Party2: | Republican Party (US) |
| Popular Vote2: | 166,308 |
| Percentage2: | 35.25% |
| Map Size: | 250px |
| U.S. Senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
The 1936 United States Senate election in Colorado took place on November 3, 1936. Incumbent Democratic Senator Edward P. Costigan did not seek a second term in office. Democratic Governor Ed Johnson won the open race to succeed him over Raymond L. Sauter.
Primary elections were held September 8. Johnson defeated former Governor William E. Sweet for the Democratic nomination. Sauter was unopposed for the Republican nomination.
Sauter was unopposed for the Republican nomination.