In June, the U.S. House and Senate passed resolutions apologizing for slavery and racial segregation of African Americans.
The group expressed the measures should be viewed as a means to open dialog about the reparations issue, but more needs to be done.
"Due to the fact of the trans-Atlantic slave trade, a group of people have been dismembered, and reparations will remember that group of people," Pat Hill, of the African American Police League said.
The demonstrators say five areas of injuries should be compensated for, education, economics, health, human rights and criminalization.
The coalition explains that reparations are what it calls a crossroad solution to the human capital development of African Americans.