Lombard nationalism is a nationalist, but primarily regionalist, movement active primarily in Lombardy, Italy. It seeks more autonomy or even independence from Italy for Lombardy and, possibly, all the lands that are linguistically or historically Lombard. During the 1990s, it was strictly connected with Padanian nationalism.

Today the main Lombard nationalist parties are the Lombard League and Pro Lombardy Independence.

Like in the rest of Europe, during the Romantic Era there was an awakening of the national sentiment in Lombardy. The Napoleonic creation of the Cispadane Republic, which was later replaced by the Cisalpine one, opened the doors to the political debate. Carlo Botta, a Piedmontese politician, wrote a book entitled Proposition to the Lombards about a way of free government, where he claimed the need of a constitution for the Lombard Nation, independent from the French one inspired by the Revolution. At the same time, Giuseppe Faroni proposed a draft constitution entitled Constitutional pole for the Lombard Republic.

The first independence movements appeared in the first half of the 19th century. Carlo Porta, one of the most important Lombard intellectuals, presented his adhesion to this idea in some writings. They were often associated with Italian federalist movements, but they considered Lombardy as a nation instead a mere administrative division of the future state:

Che vegga Italia e la nazion lombarda
strette ad un patto

That I'll see Italy and the Lombard nation
close to a deal

— Pater Noster (dei Milanesi), a patriotic song of 1848

During the Five Days of Milan in 1848, at first, insurgents only wanted greater autonomy for Lombardy in the Austrian Empire, with the possibility to administrate itself. A large part of the leaders of the insurrection, such as Carlo Cattaneo, was opposed to the Piedmont intervention.