How much did a postage stamp cost in 1980?

A first-class postage stamp in 1980 cost 15 cents, according to the United States Postal Service. This price was effective from May 29, 1978, until the rate increased to 18 cents on March 22, 1981.

Initially, first-class postage cost 2 cents in 1885, remaining there for 32 years. The price fluctuated some in subsequent years, but it did not exceed 5 cents until 1968. Since then, rates have increased by a few cents every few years, and the price as of January 2014 is 49 cents, which is an increase of 3 cents from the previous price of 46 cents.