Karel Boháček was a Czech academic painter.

He was born in the village of Zamachy to a blacksmith Václav Boháček and his wife Kateřina, née Švancarová. He graduated from the municipal school in nearby Kadlín and continued his education at the German municipal school in Česká Lípa. In 1899-1901, he continued his education at the burgher school in Mladá Boleslav and then graduated from the ceramics school in Bechyně (1901-1903).

He received further education at the Prague Academy of Painting in 1904-08 and 1913-14 under professors Bukovac, Thiele and Krattner, from whom he also graduated in 1914. In 1909, he joined the Art Discussion Society, along with Václav Rabas, Oldřich Koníček, Jan Šedivý and Josef Vokálek, with whom he exhibited from 1910. After his studies he mostly stayed in his native Zamachy. He spent four war years of the World War on the battlefields of the Russian and Italian fronts. He was wounded twice (1915 and 1917). The war hindered his artistic development and, together with his difficult material situation, led to an outbreak of lung disease in 1927, which treatment at the sanatorium in Pleš near Dobříš could no longer avert. His last paintings also come from the vicinity of Nová Ves pod Pleší. He died in 1928 in the Vinohrady Hospital in Prague, and was buried in the Vinohrady Cemetery.