Open data - freely accessible data, information or parts of data recorded in the activities or documents of the institution, irrespective of the manner, form and medium in which they are made available, including registry data, registry information, data from documents and/or copies thereof submitted to the registry, and data from the public information system, which may be reused and disseminated by any person, for any purpose whatsoever and with acknowledgement of the source, and under the conditions under which they were obtained.

The Open Data Maturity Study assesses 4 key areasOpen data policy, national open data portal, impact of open data and data quality. Looking at Lithuania's performance, the most significant progress has been made in the areas of the Open Data Portal and the Open Data Policy: the Open Data Portal was launched in early 2020. Lithuanian Open Data Portal, the adoption of relevant legislation, training for public sector bodies and various events involving business and the public. The topic of open data is becoming more and more topical every day and is gaining more and more attention in society.

All the country's open data is published Lithuanian Open Data Portal, managed by the Committee on the Development of the Information Society.

• In Lithuania, data opening is regulated by: 
• Directive (EU) 2019/1024 of the European Parliament and of the Council of 20 June 2019 on open data and the re-use of public sector information;
• Law of the Republic of Lithuania on the right to obtain information from state and municipal institutions and bodies ;
• Regulations of the Portal of Collections of Documents, approved by the Resolution of the Government of the Republic of Lithuania No 24 of 15 January 2020 "On the Establishment of the Portal of Collections of Documents and Approval of its Regulations";
• Recommendations on the opening of public sector data, approved by the Order of the Minister of Economy and Innovation of the Republic of Lithuania No 4-1150 of 28 December 2020 "On the Approval of Recommendations on the Opening of Public Sector Data".
• Datasets opened by the Ministry of Education, Science and Sport of the Republic of Lithuania:
• https://www.aikos.smm.lt/Puslapiai/Pradinis.aspx;
• http://www.svis.smm.lt/;
  https://www.regia.lt/zemelapis/.
• Planned open datasets:
• Map of sports infrastructure - data in preparation.