2023 in Lithuania

• President: Gitanas Nausėda
• Prime Minister: Ingrida Šimonytė

Ongoing: 2021–2023 Belarus–European Union border crisis, COVID-19 pandemic in Lithuania

• January 18 – Lithuanian government renounced the agreement signed with Belarus on the principles of cross-border cooperation. The bill terminated the agreement signed by the governments of Lithuania and Belarus in Vilnius on June 1, 2006, to set out areas of cross-border cooperation between the two neighbouring countries, as a response to 2021–2023 Belarus–European Union border crisis.[1]

• January 13: 2023 Lithuania–Latvia pipeline explosion: an explosion in Lithuania–Latvia Interconnection pipeline system by Pasvalio Vienkiemiai village, Pasvalys District Municipality.[2] As a precaution the entire village of Valakėliai was evacuated.[2][3][4]
• January 31: bridge partially collapsed in Kėdainiai downtown over Nevėžis river. Bridge connected the city with main intercity roads.[5][6]

Lithuanian parliament Seimas released the statement confirming the celebratory of following three national anniversaries in 2023:[7]

• 700 years anniversary of establishment of Vilnius
• 100 years anniversary of reunification with Klaipėda
• 400 years anniversary of Josaphat Kuntsevych's sacrifice.

• January 2 – Lithuanian Railways stopped 3 direct train services Šiauliai–Panevėžys, Radviliškis–Mažeikiai and Radviliškis–Šiauliai. All 3 routes were replaced by Panevėžys–Šiauliai–Mažeikiai route, coursing 8 times a day and combining Radviliškis–Daugavpils Railway and Libau–Romny Railway infrastructure.[8]

• January 1 – new record set for warmest new year day in Lithuanian history with temperature rising to 14.9 C in Druskininkai municipality.[9]
• January 5 – Minija river broke through flood wall and flooded Stragnai II village.[10]
• January 14 – a sinkhole formed that was 17.2m in diameter in Užubaliai, Biržai District Municipality. It was the biggest sinkhole to appear in Lithuania within the last two decades.[11]
• January 22 – oil spill from discontinued railway factory polluted Nemunas river in Kaunas. Pollution stopped the following day.[12]
• January 30 – Nevėžis river flooded Justinava village.[13]

• January 1 – new restriction come into action preventing minors under 18 years old to participate in any form of lottery.[14] Minors caught buying a lottery ticket would be issued with the fine up to 440 euros, while service provider selling lottery tickets to minors could be issued with up to 3000 euros fine.
• January 1 – changes in maternity and paternity time-off law came into action. The time off law was changed from 12-24 months to 18-24 months, the government pay-outs changed to direct pays of 100.54% based on parent's direct salary, single parents gained increased pay-outs.[15]
• January 31 – three homemade bombs was detected in Vilnius Levas Karsavinas school. All students and teachers evacuated, while special forces inspected the bombs.[16]

• January 13: Freedom Award by Seimas awarded to Ukrainian president Volodymyr Zelenskyy, presentation held in National Parliament.[19]
• January 23: Kristijonas Bartoševičius withdrew his membership in the national parliament Seimas.[20] On February 1, the official investigation started for allegations of paedophilia against Bartoševičius.[21]
• February 7: National Freedom Scholarship awarded to philosopher Vilius Bartninkas.[22]

• 5–12 February: 2023 Vitas Gerulaitis Cup
• 19–21 May 2023: 2023 EuroLeague Final Four
• 26 July – 5 August: 2023 World Glider Aerobatics Championships
• 27 August – 3 September: 2023 470 Junior World Championships
• 12–17 September: 2023 World Junior Modern Pentathlon Championships