Welcome to CoinTalk Cathy! Yes that is an error coin. It's called an Off Center Strike. Where did you find it? Please post a picture of the Reverse side also.
I'm trying to post reverse side but I'm having trouble. Phone is saying not enough memory to complete action.
@Curious Cathy Hold on Cathy. I am sorry but I think I made a mistake. Looking at the Reverse I have now determined that you have a Misaligned Die Strike on the Obverse. Since the Reverse is not Off Center then it can't be an Off Center Error Quarter @cpm9ball what do you think?
If that is the same coin in both photos, your quarter is a misaligned die strike, and not an off center strike, the former being more rare than the latter. Edit . . . late in replying . . . same as Paddy said . . .