Desplegable con la lista de provincias de España

provincias.html

  <select required name="provincia" class="form-control">
    <option value="">Elige Provincia</option>
    <option value="Álava/Araba">Álava/Araba</option>
    <option value="Albacete">Albacete</option>
    <option value="Alicante">Alicante</option>
    <option value="Almería">Almería</option>
    <option value="Asturias">Asturias</option>
    <option value="Ávila">Ávila</option>
    <option value="Badajoz">Badajoz</option>
    <option value="Baleares">Baleares</option>
    <option value="Barcelona">Barcelona</option>
    <option value="Burgos">Burgos</option>
    <option value="Cáceres">Cáceres</option>
    <option value="Cádiz">Cádiz</option>
    <option value="Cantabria">Cantabria</option>
    <option value="Castellón">Castellón</option>
    <option value="Ceuta">Ceuta</option>
    <option value="Ciudad Real">Ciudad Real</option>
    <option value="Córdoba">Córdoba</option>
    <option value="Cuenca">Cuenca</option>
    <option value="Gerona/Girona">Gerona/Girona</option>
    <option value="Granada">Granada</option>
    <option value="Guadalajara">Guadalajara</option>
    <option value="Guipúzcoa/Gipuzkoa">Guipúzcoa/Gipuzkoa</option>
    <option value="Huelva">Huelva</option>
    <option value="Huesca">Huesca</option>
    <option value="Jaén">Jaén</option>
    <option value="La Coruña/A Coruña">La Coruña/A Coruña</option>
    <option value="La Rioja">La Rioja</option>
    <option value="Las Palmas">Las Palmas</option>
    <option value="León">León</option>
    <option value="Lérida/Lleida">Lérida/Lleida</option>
    <option value="Lugo">Lugo</option>
    <option value="Madrid">Madrid</option>
    <option value="Málaga">Málaga</option>
    <option value="Melilla">Melilla</option>
    <option value="Murcia">Murcia</option>
    <option value="Navarra">Navarra</option>
    <option value="Orense/Ourense">Orense/Ourense</option>
    <option value="Palencia">Palencia</option>
    <option value="Pontevedra">Pontevedra</option>
    <option value="Salamanca">Salamanca</option>
    <option value="Segovia">Segovia</option>
    <option value="Sevilla">Sevilla</option>
    <option value="Soria">Soria</option>
    <option value="Tarragona">Tarragona</option>
    <option value="Tenerife">Tenerife</option>
    <option value="Teruel">Teruel</option>
    <option value="Toledo">Toledo</option>
    <option value="Valencia">Valencia</option>
    <option value="Valladolid">Valladolid</option>
    <option value="Vizcaya/Bizkaia">Vizcaya/Bizkaia</option>
    <option value="Zamora">Zamora</option>
    <option value="Zaragoza">Zaragoza</option>
  </select>

<select id="comunidades"> <optgroup label="Andalucía"> <option value="Almería">Almería</option> <option value="Cádiz">Cádiz</option> <option value="Córdoba">Córdoba</option> <option value="Granada">Granada</option> <option value="Huelva">Huelva</option> <option value="Jaén">Jaén</option> <option value="Málaga">Málaga</option> <option value="Sevilla">Sevilla</option> </optgroup> <optgroup label="Aragón"> <option value="Huesca">Huesca</option> <option value="Teruel">Teruel</option> <option value="Zaragoza">Zaragoza</option> </optgroup> <optgroup label="Asturias"> <option value="Asturias">Asturias</option> </optgroup> <optgroup label="Baleares"> <option value="Baleares">Baleares</option> </optgroup> <optgroup label="Canarias"> <option value="Las Palmas">Las Palmas</option> <option value="Santa Cruz de Tenerife">Santa Cruz de Tenerife</option> </optgroup> <optgroup label="Cantabria"> <option value="Cantabria">Cantabria</option> </optgroup> <optgroup label="Castilla-La Mancha"> <option value="Albacete">Albacete</option> <option value="Ciudad Real">Ciudad Real</option> <option value="Cuenca">Cuenca</option> <option value="Guadalajara">Guadalajara</option> <option value="Toledo">Toledo</option> </optgroup> <optgroup label="Castilla y León"> <option value="Ávila">Ávila</option> <option value="Burgos">Burgos</option> <option value="León">León</option> <option value="Palencia">Palencia</option> <option value="Salamanca">Salamanca</option> <option value="Segovia">Segovia</option> <option value="Soria">Soria</option> <option value="Valladolid">Valladolid</option> <option value="Zamora">Zamora</option> </optgroup> <optgroup label="Cataluña"> <option value="Barcelona">Barcelona</option> <option value="Girona">Girona</option> <option value="Lleida">Lleida</option> <option value="Tarragona">Tarragona</option> </optgroup> <optgroup label="Extremadura"> <option value="Badajoz">Badajoz</option> <option value="Cáceres">Cáceres</option> </optgroup> <optgroup label="Galicia"> <option value="A Coruña">A Coruña</option> <option value="Lugo">Lugo</option> <option value="Ourense">Ourense</option> <option value="Pontevedra">Pontevedra</option> </optgroup> <optgroup label="Madrid"> <option value="Madrid">Madrid</option> </optgroup> <optgroup label="Murcia"> <option value="Murcia">Murcia</option> </optgroup> <optgroup label="Navarra"> <option value="Navarra">Navarra</option> </optgroup> <optgroup label="País Vasco"> <option value="Álava">Álava</option> <option value="Guipúzcoa">Guipúzcoa</option> <option value="Vizcaya">Vizcaya</option> </optgroup> <optgroup label="La Rioja"> <option value="La Rioja">La Rioja</option> </optgroup> <optgroup label="Valencia"> <option value="Alicante">Alicante</option> <option value="Castellón">Castellón</option> <option value="Valencia">Valencia</option> </optgroup> <optgroup label="Ceuta"> <option value="Ceuta">Ceuta</option> </optgroup> <optgroup label="Melilla"> <option value="Melilla">Melilla</option> </optgroup> </select>