The list of sources for the new Lithuanian State Archive includes government, electoral, judicial, control, environmental, financial, tax, cultural, educational, national security, national defence, social security, transport, communications, health care and supervision, law and order and law enforcement, economic, agricultural and other institutions operating since 1990.
Archive holdings. According to the data for 2023, the Modern State Archive of Lithuania holds 218 document collections, comprising about 160 000 accounting units, recorded in 359 files, including electronic documents. The paper documents stored occupy about 4020 m of shelves. New document storage facilities have been opened at 25 O. Milašiaus Street and are currently being expanded with new document holdings.
The archive holds documents of the Supreme Council of the Republic of Lithuania - the Reconstituted Seimas, the Seimas of the Republic of Lithuania, the Seimas of the Republic of Lithuania, the President of the Republic of Lithuania, and the municipal election documents, including the documents of the Supreme Council of the Republic of Lithuania of 11 March 1990. the original of the Act on the Restoration of the Independent State of Lithuania (with the signatures of the deputies), which the Lithuanian National Commission for UNESCO received on 30 March 2006. documents of liquidated and reorganised ministries, state power and administration, political and social organisations: Lithuanian Sąjūdis, Lithuanian Nationalist Union (LTS), Lithuanian American National Union, Citizens' Charter of the Republic of Lithuania, Independence Party, Social Democratic Party of Lithuania (LSDP), Democratic Labour Party of Lithuania (LDDP), Political Party "Lithuanian Christian Democrats", Union of Modern Christian Democrats (MKDS), Union of Polish Poles of Lithuania (LLS), New Union (Social Liberals).
The complex of personal fonds held at the New Archives of the State of Lithuania consists of documents on the political and professional activities of the signatories of the Act of 11 March 1990, Vytenis Povilis Andriukaitis, Kazimieras Antanavičius, Virgilijus Juozas Čepaitis, Bronislovas Genzelas, Bronislovas Juozas Kuzmickas, Kazimiers Motieka, Saulijus Pečeliūnas, and journalist and politician Algimantas Deguitis.