Teodoro Lechi (Brescia, 16 January 1778 – Milan, 2 May 1866) was an Italian general, a Jacobin and a military advisor to King Carlo Alberto of Sardinia.

With Prince Eugene, Lechi fought at Austerlitz (1805), in Veneto, in Dalmatia, in Albania, in Hungary and became brigade general in 1809.

In 1813 and 1814 he took part also in the war against Austria, despite awareness of the decline of the Napoleonic age, as commanding officer of the IV Division of the Army of Italy.

During the Five Days of Milan the now 72 years old Teodoro Lechi returned to action: on 28 March 1848 he assumed the command of the Civic Guard.

At the end of the war Teodoro Lechi moved to Piedmont, where he was appointed General of the Army by King Carlo Alberto.