Porumbacu de Jos

Infobox Settlement
subdivision_type = Country
subdivision_name = ROU
timezone=EET
utc_offset=+2
timezone_DST=EEST
utc_offset_DST=+3
map_caption = Location of Porumbacu de Jos

|official_name=Porumbacu de Jos

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image_shield=
subdivision_type1=County
subdivision_name1=Sibiu County
subdivision_type2=Status
subdivision_name2=Commune
settlement_type=Commune|
leader_title=Mayor
leader_name=Ioan Strava
leader_party=Social Democratic Party
|area_total_km2=184.87
population_as_of=2000
population_total=3234|latd=45|latm=45|lats=49|latNS=N|longd=24|longm=27|longs=51|longEW=E|
website=http://www.cjsibiu.ro/ro/porumbacu.php

Porumbacu de Jos ( _de. Unter-Bornbach, _hu. Alsóporumbák) is a commune in Sibiu County, Transylvania, central Romania, first documented in 1473.

It has a population of 3234 (2002) and an administered area of 18,487 ha (see map). It is a base for hiking and climbing tours to the southern Carpathians, notably the Negoiu chalet at 1546m altitude.