Pacific (formerly Franklin) is a city in the U.S. state of Missouri in eastern Franklin County and extending to the east into southwest St. Louis County. The population was 7,002 at the 2010 census.
Throughout the early 19th century, the area that would eventually become Pacific slowly developed, with the first log cabin being constructed in 1820 and a covered bridge across the nearby Meramec River being constructed in 1838.
The Town of Franklin, Missouri was platted in 1852. The following year, the Pacific Railroad laid tracks in the town, and the railroad opened on July 19, 1853. A post office was opened in 1854, and has continuously operated since. The first city school was constructed in 1855.
In 1859, Franklin was incorporated as a fourth-class city and, in honor of the railroad, changed its name to Pacific.
On October 1, 1864, as a part of former Missouri governor and Maj. Gen. Sterling Price's unsuccessful Missouri Expedition, a brigade of the Arkansas Cavalry of the Confederate States Army under the command of Gen. William Cabell was sent to Pacific from near Saint Clair.