Ludwik () is a Polish given name. Notable people with the name include: * Ludwik Fleck (1896–1961), Polish medical doctor and biologist * Ludwik Gintel (1899–1973), Polish-Israeli Olympic soccer player * Ludwik Hirszfeld (1884–1954), Polish microbiologist * Ludwik Krzywicki (1859–1941), Polish economist and sociologist * Ludwik Lawiński (1887–1971), Polish film actor * Ludwik Mlokosiewicz (1831–1909), Polish explorer, zoologist and botanist * Ludwik Mycielski (1854–1926), Polish politician * Ludwik Rajchman (1881–1965), Polish bacteriologist * Ludwik Silberstein (1872–1948), Polish-American physicist that helped make special relativity and general relativity staples of university coursework * Ludwik Starski (1903–1984), Polish lyricist and screenwriter * Ludwik Waryński (1856–1889), Polish activist and theoretician of the socialist movement * Ludwik Zamenhof (1859–1917), Polish medical doctor, writer, and inventor of Esperanto. Other people include: * Ignace Reiss (1899-1937), Soviet spy whose best-known cover name was "Ludwik." {{given name Polish masculine given names