Tarnówka may refer to:

• Tarnówka, Złotów County in Greater Poland Voivodeship (west-central Poland)
• Tarnówka, Kuyavian-Pomeranian Voivodeship (north-central Poland)
• Tarnówka, Łódź Voivodeship (central Poland)
• Tarnówka, Masovian Voivodeship (east-central Poland)
• Tarnówka, Gmina Dąbie in Greater Poland Voivodeship (west-central Poland)
• Tarnówka, Gmina Grzegorzew in Greater Poland Voivodeship (west-central Poland)
• Tarnówka, Gmina Kłodawa in Greater Poland Voivodeship (west-central Poland)

• Opening of the Casks
• Opening of the depots
• Opening of the North Atlantic Ocean
• Opening of the Olympic Games
• Opening parentheses
• Opening parenthesis
• Opening phase of the Renaissance
• Opening phrase
• Openings (The Killing)
• Opening theme
• Opening trap
• Open-innovation
• Open Innovations (event)
• Open Interconnect Consortium
• Open Interface
• Open International de Squash de Nantes
• Open International de Squash de Nantes 2015
• Open International Feminin Midi-Pyrenees Saint-Gaudens Comminges
• Open International Féminin Midi-Pyrénées Saint-Gaudens Comminges
• Open Internet
• Open Internet Order
• OpenIntro Statistics
• Open Invitation
• Open Invitation (Santana song)
• Open IPTV Forum