| Conflict: | Battle of Villmanstrand |
| Partof: | the Russo-Swedish War (1741–1743) |
| Place: | Villmanstrand, Sweden (present-day Lappeenranta, Finland) |
| Date: | 23 August 1741 |
| Result: | Russian victory |
| Combatant1: | Sweden |
| Combatant2: | Russian Empire |
| Commander1: | Carl Henrik Wrangel Ernst Gustaf von Willebrand |
| Commander2: | Peter von Lacy |
| Strength1: | Swedish estimates: 3,000–4,000 Russian estimates: 5,256–5,600 |
| Strength2: | Russian estimates: 10,000 Swedish estimates: 13,000–18,000 |
| Casualties1: | Swedish estimates: 1,000 killed or wounded 1,345 captured Russian estimates: 3,300–4,000 killed or wounded 1,337 captured |
| Casualties2: | Russian estimates: 515 killed 1,870 wounded |
The Battle of Villmanstrand, also the storming of Villmanstrand,[1] was fought during the Russo-Swedish War on 23 August 1741, when Russian forces of 10,000 men (13,000, or 16,000–18,000, according to Swedish estimates), under the command of General Peter von Lacy, assaulted Villmanstrand (Finnish: Lappeenranta).
Fighting began around 2 P.M. but the Swedes, counting 3,000–4,000 men (5,256–5,600 according to Russian estimates) withdrew already at 5 P.M.
Swedish casualties amounted to between 2,000 and 2,500 men, or 3,300–4,000 killed and wounded, and 1,337 captured (among them General Carl Henrik Wrangel), with four colours, 12 cannons and one mortar lost according to Russian estimates. Soon after, the Swedes rallied 1,400 men from the Södermanland (300), Dalarna (above 400), Västerbotten (above 300), and Tavastehus (370) regiments (including sick or elsewhere commanded troops not present at the battle). This number does not count the Karelian Dragoons, Savolax Regiment or the Willebrand infantry which were the first Swedish units to flee and thus suffered the least casualties.
The Russians admitted a loss of 515 killed and 1,870 wounded. After the battle, the Swedes claim to have received reports from captured Russian officers stating a loss of 8,000 Russians killed. Von Lacy did not continue his movement after the battle. Henrik Magnus Buddenbrock was executed for his perceived incompetence.
Russian Colonel Christoph Hermann Manstein's estimates of the Swedish strength, reportedly derived from Wrangel's muster roll at the day of the battle. It is unknown if this also includes sick and elsewhere commanded soldiers not present at the battle. Manstein's figures does, however, include the Kymmenegård (Kiminogon) battalion and the second Savolax battalion, neither of which were present at the battle (these are struck through).