Car key will not turn in ignition?

Have you wiggled your clutch? Sometimes your car won't go all the way in park so the key won't turn.
But if that is fine then problem is with ignition key, try with another key and see if its turning.If not then its confirmed that keys are good but problem is ignition key lock cylinder.The tumblers in the cylinders get jammed and cause this problem. Spray few amount of wd-40 in the ignition key hole.Let it remain there for few minutes, then try to insert key and turn.If it turns then your problem solved, but if problem is same then its time to get ignition lock cylinder replaced and get new keys made for ignition lock cylinder from dealer.In some cases wiggling the steering from left to right and from right to left helps in getting the key to turn.