The American College of Allergy, Asthma & Immunology offers an online locator and a telephone referral. You can enter your zip code and find a specialist in your area, or call a special phone number and find the same. The online search will also give you maps and driving distances. A good resource for finding an allergist near you.

Straightforward page that is exactly as advertised... enter your location and identify a board certified allergist near you.