The National Liberal Party (Romanian: Partidul Național Liberal, PNL) is a Christian democratic political party in Romania. As of mid 2025, it is the country's third largest political party overall. Re-founded in mid January 1990, shortly after the Revolution of 1989 which culminated in the fall of communism in Romania, it claims the legacy of the major political party of the same name, active between 1875 and 1947 in the Kingdom of Romania.

Based on this historical legacy, it often presents itself as the first formally constituted political party in the country and the oldest of its kind from the family of European liberal parties as well.

Until 2014, the PNL was a member of the Alliance of Liberals and Democrats for Europe (ALDE). The party statutes adopted in June 2014 dropped any reference to international affiliation, consequently most of its MEPs joined the European People's Party Group (EPP) in the European Parliament.

On 12 September 2014, it was admitted as a full member of the European People's Party (EPP), and subsequently merged with the Democratic Liberal Party (PDL). The party was also a member of the Liberal International (LI) before switching to Centrist Democrat International (CDI). Currently, it is the third-largest party in the Romanian Parliament, with 49 seats in the Chamber of Deputies and 22 in the Senate, behind the Alliance for the Union of Romanians (AUR). Additionally, the party currently has the largest number of MEPs in the European Parliament on behalf of Romania (more specifically 10 out of 33).

At local political level, the PNL has been very closely associated with either the Democratic Forum of Germans in Romania (FDGR/DFDR), more specifically in parts of Banat and Transylvania, or, formerly, with the Christian Democratic National Peasants' Party (PNȚCD), in southern Romania.

After it won the 2020 local elections, the PNL became the first political party in Transylvania, Banat, and Bukovina, establishing new political alliances at national level with, most notably, USR PLUS shortly thereafter. Moreover, as of mid 2023, the PNL also holds the largest amount of incumbent county councillors and local councillors nationwide, making it, in these regards, the most influential political party in Romania at local level. Nonetheless, concerning the total amount of mayors, the PNL comes second behind the PSD.

During late 2021, the PNL broke the alliance with USR PLUS (now simply legally known as USR) and continued under former party president Cîțu a minority government alongside the Hungarian minority-oriented UDMR (with the support of President Klaus Iohannis), consequently causing the three month-long 2021 Romanian political crisis, until successfully negotiating with their historical nominal adversaries PSD in early November 2021 a grand coalition government between themselves and the UDMR (known as the National Coalition for Romania or CNR for short), thereby leading to the formation of the Ciucă cabinet led by Prime Minister Nicolae Ciucă.

In mid June 2023, Ciucă resigned as part of the coalition protocol previously agreed between the PNL and PSD and let Marcel Ciolacu (current PSD leader) become the incumbent Prime Minister of Romania. In the meantime, the UDMR was also taken out of government and thereby rejected from the composition of the current Ciolacu Cabinet in which PNL is still the second party. Furthermore, the share of governmental power between the PSD and PNL is even between the two constituent political parties of the incumbent Ciolacu Cabinet (or the second CNR cabinet).