As an extranjero in Santiago, Chile, you will most likely be paying a visit to your local Civil Registry Office (Registro Civil) at some point, for example if applying for a temporary residency visa, permanent residency, Chilean identity card or for various other trámites (legal processes). So why would you need to go there, and where can you find this building?
You will need to go here to collect your Chilean identity card, as well as to collect a certificado de antecedentes (a criminal record certificate) when you apply for permanent residency in Chile.
The one nearest to where I live is on 543 Miguel Claro in Providencia, but there are many locations dotted around Santiago. To find the one nearest to you, go to the registro civil website. Click “OFICINAS Y HORARIOS” at the top of the page, and select your region (Region Metropolitana for Santiago). You will be presented with a map showing the locations of Registro Civil offices near to you.
Opening hours vary, but the largest office is at Huérfanos 1570 in Santiago Centro, and it is open from 08:30 to 14:00. As with all government offices, I strongly suggest arriving early if you want to avoid a very long queue.