Târgu Ocna

{{Infobox Romanian subdivision

|type = town

|county = Bacău

|official_name = Târgu Ocna

|image_flag =

|image_shield = ROU BC Targu Ocna CoA1.png

|image_skyline = Ajuntament de Târgu Ocna.jpg

|image_caption = Târgu Ocna town hall

|image_location =

|image_map = Targu Ocna jud Bacau.png

|map_caption = Location in Bacău County

|leader_name = Cristian-Aurelian Ciubotaru{{cite web |url=https://prezenta.roaep.ro/locale27092020/romania-pv-final |title=Results of the 2020 local elections |publisher=Central Electoral Bureau |access-date=8 June 2021 |df=dmy-all}}

|leader_party = PSD

|term = 2020–2024

|coordinates = {{coord|46|16|48|N|26|37|12|E|region:RO|display=inline,title}}

|elevation = 263

|elevation_min =

|elevation_max =

|area_total = 48.90

|area_footnotes =

|population_as_of =

|population_total = auto

|population_footnotes =

|postal_code = 605600

|area_code = (+40) 02 34

|website = {{url|http://orasul-targuocna.ro/}}

}}

Târgu Ocna ({{IPA|ro|ˌtɨrɡu ˈokna}}; {{langx|hu|Aknavásár}}) is a town in Bacău County, Romania.

It administers two villages, Poieni and Vâlcele.

The town is situated on the left bank of the Trotuș River, an affluent of the Siret, and on a branch railway which crosses the Ghimeș Pass from Moldavia into Transylvania. Târgu Ocna is built among the Carpathian Mountains on bare hills formed of rock salt.{{EB1911|inline=y|wstitle=Tîrgu Ocna|volume=26|page=1010}} In fact, the English translation of Ocna is salt mine.

Târgu Ocna's main industry is salt production, as it is the largest provider in Moldavia. Other industries include wood processing, coal mining, steel producing, and petroleum-based industries.

{{Historical populations

|source = Census data

|1900 |8033

|1912 |7989

|1930 |12588

|1948 |9796

|1956 |11227

|1966 |11647

|1977 |12603

|1992 |16071

|2002 |14184

|2011 |11300