B K Vishwanathan, born on 18 July 1935, is a retired Indian Administrative Service officer from the Karnataka cadre. A graduate by education, he served in various capacities during his career. His most recent designation was Deputy Commissioner at Chitradurga, Karnataka, from 1 June 1992 to 1 July 1993. He also held the position of Director of Census Operations in the Land Revenue Department. Vishwanathan's service reflects his commitment to administrative roles within the state of Karnataka.