Pittsburg is an unincorporated community located in Johnson County in the U.S. state of Arkansas. The community lies at a latitude of approximately 35.4375° N and a longitude of ‑93.36944° W, within the Central Time Zone.
The settlement was named after the industrial city of Pittsburgh, Pennsylvania, reflecting a common practice of borrowing place names from more prominent locations. As an unincorporated area, Pittsburg does not have a municipal government and is administered as part of Johnson County.
No extensive demographic, historical, or economic data are available in widely recognized reference sources for Pittsburg, Arkansas; the community is generally mentioned only in geographic and place‑name listings.