A HTML form select with US states and territories

HTML-selectList-US-States

<form id="res_form" action="" method="post" accept-charset="utf-8">
  <fieldset>
    <legend>Guest Information<span>* Indicates required field</span></legend>
      
        <label for="state">* State/Territory/Associations</label>
        <select name="state" required title="Please select a state or territory.">
            <option value="">select your location</option>
          <optgroup label="US Territories">
            <option value="AS">American Samoa</option>
            <option value="PR">Commonwealth of Puerto Rico</option>
            <option value="MP">Commonwealth of the Northern Mariana Islands</option>
            <option value="DC">District of Columbia</option>
            <option value="GU">Guam</option>
            <option value="VI">US Virgin Islands</option> 
          </optgroup>
            
          <optgroup label="Associated States">
            <option value="FM">Federated States of Micronesia</option>
            <option value="PW">Republic of Palau</option>
            <option value="MH">Republic of the Marshall Islands</option>
          </optgroup>

          <optgroup label="US States">
            <option value="AL">Alabama</option>
            <option value="AZ">Arizona</option>
            <option value="AR">Arkansas</option>
            <option value="CO">Colorado</option>
            <option value="CT">Connecticut</option>
            <option value="DE">Delaware</option>
            <option value="FL">Florida</option>
            <option value="GA">Georgia</option>
            <option value="ID">Idaho</option>
            <option value="IL">Illinois</option>
            <option value="IN">Indiana</option>
            <option value="IA">Iowa</option>
            <option value="KS">Kansas</option>
            <option value="KY">Kentucky</option>
            <option value="LA">Louisiana</option>
            <option value="ME">Maine</option>
            <option value="MD">Maryland</option>
            <option value="MA">Massachusetts</option>
            <option value="MI">Michigan</option>
            <option value="MN">Minnesota</option>
            <option value="MS">Mississippi</option>
            <option value="MO">Missouri</option>
            <option value="MT">Montana</option>
            <option value="NE">Nebraska</option>
            <option value="NH">New Hampshire</option>
            <option value="NJ">New Jersey</option>
            <option value="NM">New Mexico</option>
            <option value="NY">New York</option>
            <option value="NC">North Carolina</option>
            <option value="ND">North Dakota</option>
            <option value="OH">Ohio</option>
            <option value="OK">Oklahoma</option>
            <option value="OR">Oregon</option>
            <option value="PA">Pennsylvania</option>
            <option value="RI">Rhode Island</option>
            <option value="SC">South Carolina</option>
            <option value="SD">South Dakota</option>
            <option value="TN">Tennessee</option>
            <option value="TX">Texas</option>
            <option value="UT">Utah</option>
            <option value="VT">Vermont</option>
            <option value="VA">Virginia</option>
            <option value="WA">Washington</option>
            <option value="WV">West Virginia</option>
            <option value="WI">Wisconsin</option>
            <option value="WY">Wyoming</option>
          </optgroup>
        </select>

  </fieldset>
</form>