select-uf-estado.html

<select>
    <option value="">Selecione</option>
    <option value="AC">Acre</option>
    <option value="AL">Alagoas</option>
    <option value="AP">Amapá</option>
    <option value="AM">Amazonas</option>
    <option value="BA">Bahia</option>
    <option value="CE">Ceará</option>
    <option value="DF">Distrito Federal</option>
    <option value="ES">Espirito Santo</option>
    <option value="GO">Goiás</option>
    <option value="MA">Maranhão</option>
    <option value="MS">Mato Grosso do Sul</option>
    <option value="MT">Mato Grosso</option>
    <option value="MG">Minas Gerais</option>
    <option value="PA">Pará</option>
    <option value="PB">Paraíba</option>
    <option value="PR">Paraná</option>
    <option value="PE">Pernambuco</option>
    <option value="PI">Piauí</option>
    <option value="RJ">Rio de Janeiro</option>
    <option value="RN">Rio Grande do Norte</option>
    <option value="RS">Rio Grande do Sul</option>
    <option value="RO">Rondônia</option>
    <option value="RR">Roraima</option>
    <option value="SC">Santa Catarina</option>
    <option value="SP">São Paulo</option>
    <option value="SE">Sergipe</option>
    <option value="TO">Tocantins</option>
</select>

Caso precisem apenas das Ufs, segue abaixo:

<select>
<option disabled selected>UF</option>
<option value="AC">AC</option>
<option value="AL">AL</option>
<option value="AP">AP</option>
<option value="AM">AM</option>
<option value="BA">BA</option>
<option value="CE">CE</option>
<option value="DF">DF</option>
<option value="ES">ES</option>
<option value="GO">GO</option>
<option value="MA">MA</option>
<option value="MS">MS</option>
<option value="MT">MT</option>
<option value="MG">MG</option>
<option value="PA">PA</option>
<option value="PB">PB</option>
<option value="PR">PR</option>
<option value="PE">PE</option>
<option value="PI">PI</option>
<option value="RJ">RJ</option>
<option value="RN">RN</option>
<option value="RS">RS</option>
<option value="RO">RO</option>
<option value="RR">RR</option>
<option value="SC">SC</option>
<option value="SP">SP</option>
<option value="SE">SE</option>
<option value="TO">TO</option>
</select>

thanks guys