jQuery Simple Example

HTML

<script src="//www.addressfinder.co.nz/assets/v2/widget.js"></script>
<select id="seuSelect">
    <option value="">Em branco</option>
</select>

JavaScript

var usuarios = [
    {"id" : 1, "login": "joao"},
    {"id" : 2, "login": "maria"}
];

$(document).ready(function() {
    $.each(usuarios, function(indice, usuario) {  
        $("#seuSelect").append(new Option(usuario.login, usuario.id));
    });   
});