During the 1930s, Pompano's white population barely increased while its black residents more than doubled their numbers.

The 1930 census showed a total population of 2,614 for the city, of which 1,127 were white and 1,487 black.

In 1940, Pompano's population had grown to 4,427, but the white residents totaled only 1,388 -- an increase of 261. The census counted 3,039 black residents, an increase of 1,552 over the previous census.