1 January – Russian gas stops flowing to Slovakia and Moldova through the territory of Ukraine. Before the transit was ended, Slovakia was the last major importer of gas through the pipeline, after the rest of the EU had gradually shifted to other gas sources after the Russian invasion of Ukraine.[1]
16 January – Two people are killed in a stabbing at a high school in Spišská Stará Ves. A student is arrested.[3]
24 January – 2025 Slovak protests: Over 130,000 people attended protests in cities across Slovakia against pro-Russian foreign policy of the government.[4]
27 January – Prime Minister: Robert Fico announces plans for constitutional amendments to the Constitution of Slovakia. One would place the constitution higher then international treaties and agreements, another would formally recognize only two genders (Male and female), restrict "gender transition" and prohibit the adoption of children by same-sex couples.[5][6][7][8]