Yes it is: Click here ;)
Is mislaid a real word?
Additionally,Originally Posted by Kc
Pat: I mislaid my keys again. (Past Tense)
Max: You're always mislaying things. (Progessive)
Pat: Like you have never mislaid anything in your life? (Perfect)
Max: Well, don't mislay your keys tonight. We're going driving. (Base)
All the best, :D