My guess is Empress Zewditu of Ethiopia who appeared on a 1918 stamp of Ethiopia.
You didn't ask from what country, so it's hard to say. If you are talking about the United States, the first Black woman to appear on a postage stamp was Harriet Tubman on Feb 1, 1978.
The first person to appear on a stamp was Queen Victoria. It was called the One Penny Black. It was issued by Great Britain in 1840.
The penny black was the worlds first postage stamp in 1840.
The first postage stamp is called the Penny Black. It was issued by Great Britain.
Penny Black
Black
The One Penny Black, the first postage stamp.
penny black
Booker T. Washington's portrait was placed on a stamp on April 7, 1940.The first Black female to be portrayed on a stamp was Harriet Tubman, issued Feb. 1, 1978.Booker T. Washington was the first black man to appear on a US stamp.Booker Taliaferro Washington
Ethel barrymore , 1982
Ethel barrymore , 1982
The first African-American woman honored on her own stamp was Harriet Tubman in 1978. Some of the letter-sorters shown on a 1973 stamp appear to black women.
The first US postage stamps ever issued was in 1847 and were - 5 cent brown featuring B Franklin 10 cent black featuring G Washington Both of these stamps served as the standard postage until 1851 when new values with mostly the same faces were introduced.