The period was marked by the lawful continuation of racial segregation in the United States, known as the Jim Crow era.
The Civil Rights Act of 1968 codified enforcement of federal law abolishing restrictive housing covenants.
Sundown town practices may be evoked in the form of city ordinances barring people of color after dark, exclusionary covenants for housing opportunity, signage warning ethnic groups to vacate, unequal treatment by local law enforcement, and unwritten rules permitting harassment.
Sundown towns in the United States include present communities that do not "socially accept" people who are not White.
The 1948 United States Supreme Court case Shelley v. Kraemer outlawed the legal enforcement of restrictive housing covenants.