For those that may not know the difference
 

ig·no·rant
[ig-ner-uhnt] Show IPA
adjective
1.
lacking in knowledge or training; unlearned: an ignorant man.
2.
lacking knowledge or information as to a particular subject or fact: ignorant of quantum physics.
3.
uninformed; unaware.
4.
due to or showing lack of knowledge or training: an ignorant statement.


stu·pid
[stoo-pid, styoo‐] Show IPA adjective, stu·pid·er, stu·pid·est, noun
adjective
1.
lacking ordinary quickness and keenness of mind; dull.
2.
characterized by or proceeding from mental dullness; foolish; senseless: a stupid question.
3.
tediously dull, especially due to lack of meaning or sense; inane; pointless: a stupid party.
4.
annoying or irritating; troublesome: Turn off that stupid radio.
5.
in a state of stupor; stupefied: stupid from fatigue.