My friends and I compiled a list of fifty largest stars, as of September 2025. D☉ is the width of the sun:

1. V538 Carinae - 1,709 D☉ (in Milky Way)
2. NML Cygni - 1,590 D☉ (in Milky Way)
3. RSGC1-F01 - 1,530 D☉ (in Milky Way)
4. HV 888 - 1,509 D☉ (in Large Magellanic Cloud)
5. UV Carinae - 1,506 D☉ (in Milky Way)
6. EV Carinae - 1,495 D☉ (in Milky Way)
7. V766 Centauri - 1,492 D☉ (in Milky Way)
8. VX Sagittarii - 1,480 D☉ (in Milky Way)
9. HD 269551 A - 1,439 D☉ (in Large Magellanic Cloud)
10. RSGC1-F04 - 1,422 D☉ (in Milky Way)
11. HV 12463 - 1,420 D☉ (in Large Magellanic Cloud)
12. VY Canis Majoris - 1,420 D☉ (in Milky Way)
13. AH Scorpii - 1,411 D☉ (in Milky Way)
14. CD-34 17794 - 1,409 D☉ (in Milky Way)
15. IRAS 14086-6907 - 1,394 D☉ (in Milky Way)
16. Westerlund 1-26 - 1,387 D☉ (in Milky Way)
17. RSGC1-F06 - 1,382 D☉ (in Milky Way)
18. IRAS 05280-6910 - 1,367 D☉ (in Large Magellanic Cloud)
19. [SM2006] W21810 - 1,363 D☉ (in Triangulum Galaxy)
20. TIC 61338885 - 1,342 D☉ (in Triangulum Galaxy)
21. IRAS 04509-6922 - 1,339 D☉ (in Large Magellanic Cloud)
22. MSX LMC 897 - 1,317 D☉ (in Large Magellanic Cloud)
23. IRAS 13479-5436 - 1,310 D☉ (in Milky Way)
24. V517 Monocerotis - 1,308 D☉ (in Milky Way)
25. V450 Scuti - 1,303 D☉ (in Milky Way)
26. Stephenson 2 DFK 2 - 1,301 D☉ (in Milky Way)
27. Stephenson 2 DFK 49 - 1,300 D☉ (in Milky Way)
28. S Persei - 1,298 D☉ (in Milky Way)
29. V669 Cassiopeiae - 1,294 D☉ (in Milky Way)
30. MSX LMC 907 - 1,294 D☉ (in Large Magellanic Cloud)
31. V668 Monocerotis - 1,292 D☉ (in Milky Way)
32. MSX SMC 055 - 1,288 D☉ (in Small Magellanic Cloud)
33. MSX LMC 597 - 1,278 D☉ (in Large Magellanic Cloud)
34. T Draconis - 1,266 D☉ (in Milky Way)
35. NGC 7793-34 - 1,264 D☉ (in NGC 7793)
36. V558 Normae - 1,261 D☉ (in Milky Way)
37. NGC 2403 V14 - 1,260 D☉ (in NGC 2403)
38. Mu Cephei - 1,259 D☉ (in Milky Way) (Largest star visible to the naked eye)
39. PZ Cassiopeiae - 1,259 D☉ (in Milky Way)
40. MSX LMC 1429 - 1,253 D☉ (in Large Magellanic Cloud)
41. MSX LMC 961 - 1,248 D☉ (in Large Magellanic Cloud)
42. RSGC1-F10 - 1,246 D☉ (in Milky Way)
43. V354 Cephei - 1,245 D☉ (in Milky Way)
44. WOH S69 - 1,242 D☉ (in Large Magellanic Cloud)
45. WOH S55 - 1,234 D☉ (in Large Magellanic Cloud)
46. NGC 247-154 - 1,218 D☉ (in NGC 247)
47. PMMR 9 - 1,215 D☉ (in Small Magellanic Cloud)
48. MSX LMC 891 - 1,212 D☉ (in Large Magellanic Cloud)
49. MSX LMC 1328 - 1,211 D☉ (in Large Magellanic Cloud)
50. IRAS 05346-6949 - 1,211 D☉ (in Large Magellanic Cloud)

Stuff past like top 25 to 50 might be inaccurate, and some of the stars had a size range so I just picked the smaller size. There is also potentially another star, Stephenson 2 DFK 1 (2,150 D☉, Milky Way)-- the star is confirmed, but the size isn't.