The Battle of Pułtusk took place on December 26 1806 near Pułtusk, Poland, between 60,000 Russians with 120 guns under General Bennigsen, and 35,000 French under Marshal Lannes.

Lannes endeavoured to pierce the Russian left and cut them off from the town, but did not succeed in getting through, and in this part of the field the action was indecisive. On their left the French did little more than hold their own, but the Russians retired during the night, having lost 3,000 killed and wounded, 2,000 prisoners and a large number of guns. The French admitted a loss of only 1,500 although Russian accounts estimate French losses at about 8,000.