Ilocos Sur sī Hui-li̍p-pin ê chi̍t-ê séng, 2015 nî ê jîn-kháu ū 689,668.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Ilocos_Sur_in_Philippines.svg/640px-Ilocos_Sur_in_Philippines.svg.png)
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