Season count and series duration
Supergirl has 6 seasons. The series premiered in October 2015 and concluded in November 2021, spanning 126 episodes across those six seasons. This verified season count reflects the full released television series to date.
Season by season breakdown
Each season varies in episode count, with season one at 20 episodes and subsequent seasons ranging from 19 to 22 episodes. The following table lists season number, season year on The CW, episode count, and premiere/ finale dates where available.
| Season | Season year (The CW) | Episodes | Premiere date | Finale date |
|---|---|---|---|---|
| 1 | 2015–2016 | 20 | Oct 26, 2015 | Apr 18, 2016 |
| 2 | 2016–2017 | 22 | Oct 10, 2016 | Apr 18, 2017 |
| 3 | 2017–2018 | 23 | Oct 9, 2017 | Jun 18, 2018 |
| 4 | 2018–2019 | 24 | Oct 14, 2018 | Jun 12, 2019 |
| 5 | 2019–2020 | 19 | Oct 6, 2019 | May 17, 2020 |
| 6 | 2020–2021 | 20 | Dec 8, 2020 | Nov 9, 2021 |
Season synopses (high-information summaries)
Season 1: Origins
Kara Danvers balances life as National City’s guardian while learning what it means to be Supergirl, confronting Lex Luthor’s early schemes and building trust with the DEO.
Season 2: Invasion
The Dominators test Earth’s heroes, pushing Kara to lead an alliance of heroes and revealing more of her past through flashbacks to Krypton.
Season 3: Identity
Kara deals with Lena Luthor’s new role at CatCo, introduces Mon-El, and faces the Worldkillers as she reconciles her Kryptonian heritage with her human upbringing.
Season 4: Lena’s turn
Supergirl enters a darker tone as Lena becomes a more overt adversary, and Kara leans on the Superfriends while contending with Nyxly and magical threats.
Season 5: Legacy and loss
The season leans into multiverse concepts, introduces a major loss for Kara, and sharpens the political stakes on Earth as she balances reporter life with heroics.
Season 6: Finale arc
The concluding season grapples with grief, legacy, and the multiverse, culminating in a finale that closes major character threads while leaving some cosmic possibilities open.
Where to watch and availability
Depending on your region, Supergirl is available on several platforms for viewing or purchase. As of the latest information, it streams on Max in the United States and is available for purchase on digital stores such as Apple TV, Amazon Prime Video, Google Play, and Vudu. Physical media includes season sets and a complete series Blu-ray for collectors.
Common questions about Supergirl’s seasons
- Was Supergirl renewed for a seventh season? No. The series concluded after season 6.
- How many episodes are per season on average? Roughly 21 episodes per season, with season 5 being the shortest at 19.
- Does season order include the crossover episodes? Yes. Crossover episodes are counted within their respective season’s episode total.
- Is the series complete? Yes. All 6 seasons have been released through November 2021.
How Supergirl compares to other Arrowverse shows
Compared to contemporaries, Supergirl had a similar initial order (~20 episodes per season) and shared cross-event storylines, but it enjoyed a longer run than some peers by concluding at 6 seasons, allowing more extended character development.
Closing note
Supergirl’s 6-season arc delivers a complete journey from origin to legacy. Use the season guide, episode counts, and where-to-watch details above to plan your viewing or reference the series as a concluded, bingeable superhero drama.