Look in the phone book under music. The state music teachers have an extensive list. Also, local music stores, And, in your local paper under Music or education. Good luck!
References :

Music stores in your area will have guitars AND teachers who give guitar lessons. (Majority do anyway). It’s usually just one teacher and it’s one-on-one lessons, but some places, if there are two stories, the second story will be dedicated to lessons with several teachers teaching. This is how one music store in my state was like, and I found my current guitar teacher this way.

The phone book (or google maps) are good places to find music stores.
References :
Guitar player

In addition to the others’ answers, you should also ask anyone you know who plays guitar if they can recommend a local teacher. Word-of-mouth is usually the best way to find somebody good.

Regarding finding a guitar, here’s my *strong* recommendation:
1) Go to a music shop and try out a few guitars in the $100-400 price range. I realize you don’t know how to play yet, but just hold them, and strum them. Get a feel for them.

2) Make a note of any you like. Jot down the make and model, and what you liked about it (e.g. "not too heavy, easy to wrap my hand around the neck").

3) Find a USED guitar of the same make/model, or of a similar style. Try not to spend more than $200. There are plenty of cheap used guitars perfect for beginners. Ignore the elitist snobs who try to convince you that you need a $1000 gibson or fender.

Talk to your parents, or other adults to help you find a used one. I recommend trying (in this order):
* local music shops
* garage sales
* pawn shops
* craigslist.
* ebay

Have an adult help you!!!!!!! I cannot stress this enough. DO NOT shop for a used guitar on your own.

Hope this helps.
References :
20+ years playing.