The flag was adopted on 29 October 1953 by State Law No.

[1] The original flag of Santa Catarina, was adopted by State Law No.

126 on August 15, 1895, and stayed the state flag until 1937 when under the leadership of Getúlio Vargas, the use of state symbols was banned under the Brazilian Constitution of 1937.

[2] When a state flag was reinstated, the current design was adopted.

There is no official explanation for the symbolism of red and white on the flag.