Contact Us

    • Hours of Operation 9:00 am to 6:00 pm ET M-F

      Address
      Houghton Mifflin Harcourt
      Customer Service
      9400 Southpark Center Loop
      Orlando, FL 32819
      phone  Customer Service: 877.234.7323
      Fax  877.287.8199

      Live Chat

    • Hours of Operation 9:00 am to 6:00 pm ET M-F

      Please do not send credit card data via E-mail

      Online:  www.hmhco.com
      phone  855.969.4642
      faxNumber  800.269.5232
    • Hours of Operation 9:00 am to 6:00 pm ET M-F

      Address
      Houghton Mifflin Harcourt
      9400 Southpark Center Loop
      Orlando, FL 32819
      phone  888.242.6747
      phone  800.567.2714
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