The best knock-knock jokes

Knock, knock! Who's there? Spell. Spell who? W-H-O.
Vote:
has 69.03 % from 238 votes. More jokes about: communication, knock-knock
Fast way to screw up someone's Knock Knock joke...? "It's open."
Vote:
has 67.83 % from 635 votes. More jokes about: knock-knock, life
Knock knock! Who's there? Yah! Yah who? Naaah, bro, I prefer google.
Vote:
has 66.14 % from 350 votes. More jokes about: geek, IT, knock-knock
Knock, knock. Who's there? Owls say. Owls say who? Yep, that they do.
Vote:
has 65.46 % from 146 votes. More jokes about: animal, bird, communication, knock-knock
Knock knock. Who's there? Hatch. Hatch who? Bless you.
Vote:
has 65.37 % from 136 votes. More jokes about: communication, knock-knock
Knock Knock! Who's there? Justin Justin who? Justin time for dinner!
Vote:
has 63.84 % from 133 votes. More jokes about: kids, knock-knock
Knock knock. Who's there? Déja. Déja who? Knock knock.
Vote:
has 63.04 % from 63 votes. More jokes about: knock-knock, life, memory
Knock Knock. Who's there? Opportunity. Don't be silly - opportunity doesn't knock twice!
Vote:
has 62.88 % from 153 votes. More jokes about: knock-knock, life
Knock Knock. Who's there! Ice cream! Ice cream who? Ice cream if you don't let me in!
Vote:
has 62.48 % from 189 votes. More jokes about: food, knock-knock
Knock Knock Who's there? Muffikin Muffikin who? Muffikin fingers are trapped in the door.
Vote:
has 62.46 % from 65 votes. More jokes about: knock-knock