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Events from the year 2020 in Alabama.
Major stories in Alabama during 2020 included the COVID-19 pandemic in Alabama, the 2020 United States presidential election in Alabama, the 2020 United States Senate election in Alabama, the state's response to the coronavirus pandemic, hurricane impacts during the 2020 season, and major developments in state politics, education, business, and sports.

In the 2020 United States census, Alabama had a population of 5,024,279.
The state's largest cities, based on the 2020 census, were as follows:[citation needed]
| Rank | City | County | Population |
|---|---|---|---|
| 1 | Huntsville | Madison, Limestone, Morgan | 215,006 |
| 2 | Birmingham | Jefferson, Shelby | 200,733 |
| 3 | Montgomery | Montgomery | 200,603 |
| 4 | Mobile | Mobile | 187,041 |
| 5 | Tuscaloosa | Tuscaloosa | 99,600 |
| 6 | Hoover | Jefferson / Shelby | 92,606 |
| 7 | Auburn | Lee | 76,143 |
| 8 | Dothan | Houston, Dale, Henry | 71,072 |
| 9 | Decatur | Morgan, Limestone | 57,938 |
| 10 | Madison | Madison / Limestone | 56,933 |