Discriminatory voting practices have been a significant issue throughout Black history in the United States. One of the most well-known discriminatory practices was poll taxes, which were enacted in the late 19th and early 20th centuries to disenfranchise Black voters. Poll taxes required individuals to pay a fee in order to vote, effectively preventing many Black Americans, who were often economically disadvantaged, from exercising their right to vote.

Another discriminatory practice was literacy tests, which were used to prevent Black Americans from voting by requiring them to pass a reading or writing test. These tests were often intentionally designed to be difficult or impossible to pass, and were used to suppress Black voter turnout.

Additionally, grandfather clauses were implemented in southern states to disenfranchise Black voters. These clauses exempted individuals from voting restrictions if their grandfathers had been eligible to vote before the Civil War, effectively allowing white voters to bypass discriminatory laws while preventing Black Americans from voting.

Lastly, intimidation and violence were also commonly used to prevent Black Americans from voting. Tactics such as threats, harassment, and even physical violence were used to deter Black voters from participating in elections.

These discriminatory voting practices persisted for many years and significantly undermined the political power and representation of Black Americans. It wasn't until the Voting Rights Act of 1965 that many of these practices were officially outlawed, marking an important milestone in the fight for voting rights and racial equality.