Location The chamber office is located 1 block East of Route 608 (North State Street).Please refer to the map below. Middlefield Chamber of Commerce Subscribe Today! Please leave this field empty Receive Our Newsletters! Fill out the form below to join our mailing lists and receive monthly newsletters from Middlefield Chamber of Commerce. Business Name * First Name * Last Name * Email Address * We don’t spam! Read our privacy policy for more info. Check your inbox or spam folder to confirm your subscription.