Gratz is a home rule-class city in Owen County, Kentucky, in the United States.

The present city was laid out in 1847 on land supposedly owned by the heirs of Sen. John Brown and was probably named for his grandson B. Gratz Brown, who later became a senator from and governor of Missouri and made a failed vice-presidential bid in 1872 with Horace Greeley of the Liberal Republicans.

Before public electric service was available, a diesel powered generator fed streetlights from dusk until about 10 p.m. A former operator of this plant reported that he learned how much fuel to put into the engine so that it would run out at the desired time (saved him a trip down the hill).

[citation needed] Another legacy for the branch would begin in 1927 and continue through 1990 with Martha B. Suter serving as Gratz postmaster for a record 33 consecutive years from May 24, 1927 (just 3 years after Ida Johnson) until September 30, 1960, whereafter Suter was succeeded by another woman, Charlsey Virginia Stamper Goodrich.

Goodrich served as Gratz postmaster for 23 years from September 30, 1960, up until her early retirement (due to illness) on April 2, 1983.

It was then that another woman, Teresa A. Webster, succeeded Goodrich as Gratz postmaster from April 2, 1983, until February 6, 1990, when service was suspended after 146 years of operation.

[citation needed] In total, there were 5 women who served as Gratz Postmaster: Ida M. Johnson, Martha B. Suter (with Roberta G. Minish as 'Acting' temporarily), Charlsey Stamper Goodrich and Teresa A. Webster.

According to the United States Census Bureau, the city has a total area of 0.3 square miles (0.78 km2), all land.