Me - 4: Home, work, car key and car fob (if that counts).
Husband - 18,000. Kidding. Sort of....
I have no idea what all of his keys go to. I know he has two for work, one for home, one for the car that is also the fob. He probably has keys from his last 4 cars on there, old house keys from old houses and who knows what else. Why does he need so many? I have no idea. His keychain is so big, it doesn't fit in my girl pants pockets.