Bootstrap Center Align a Dropdown Menu

You need to put the dropdown menu and the toggle button inside a .btn-group.

Also, Bootstrap provides the .text-center property to align the contents. This can be used on .school-options-dropdown, instead of manually adding CSS.

<script src=""></script>
<script src=""></script>
<link href="" rel="stylesheet" />


<div class="row">
  <div class="col-md-12 school-options-dropdown text-center">
    <div class="dropdown btn-group">

      <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Choose a School
        <span class="caret"></span>
      </button>

      <ul class="dropdown-menu">
        <li><a href="#">Add your school</a></li>
        <li><a href="#">Hello</a></li>
      </ul>

    </div>
  </div>
</div>

I've found this when trying to solve similar problem. Credit to Vladimir Rodkin

.dropdown-menu-center {
right: auto;
left: 50%;
-webkit-transform: translate(-50%, 0);
-o-transform: translate(-50%, 0);
transform: translate(-50%, 0);}

If you don't want change your html code, this is css will solve your problem:

.dropdown {text-align:center;}
.button, .dropdown-menu {margin:10px auto}
.dropdown-menu {width:200px; left:50%; margin-left:-100px;}

Example on jsfiddle.net.

If you are looking to center align the contents of the menu, then

ul.dropdown-menu>li {
    text-align: center;
}

might do the trick.

Make sure you add the alignment in the entire div class defining it

With a Bootstrap 5 you can use JavaScript to override Popper.js after page loads like:

new bootstrap.Dropdown(document.getElementById('dropdown_button'), {
    popperConfig: function () {
        return {placement: 'bottom'}
    }
});

Official documentation:

Here are placements you can override to: