Ludvig Oskar was an Estonian painter.

He started his art studies in 1903, while artist Ants Laikmaa opened his studio school. In addition to studio classes Oskar took watercolor classes with Karl Winkler. After studies abroad he taught at Tallinna Reaalkool (Science High School of Tallinn). Among his students was Evald Okas.

In 1926 he decided to fix Pika Jala Väravatorn (the gate tower named Long Leg at the medieval city wall of Tallinn). For this purpose he took a bank loan of half a million cents (5,000 Estonian kroons) and reconstructed the tower. Oskar demolished the old mantel chimney and built to each floor ovens and stoves.