| Pittsburg, Oregon | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Oregon#USA |
| Pushpin Label: | Pittsburg |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location within the state of Oregon |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Oregon |
| Subdivision Type2: | County |
| Subdivision Name2: | Columbia |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Pacific (PST) |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Elevation Ft: | 584 |
| Coordinates: | 45.9008°N -123.1511°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 97064 |
| Area Code: | 503 and 971 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1125453 |
Pittsburg is an unincorporated community in Columbia County, Oregon, United States. Pittsburg is located on the Nehalem River near its confluence with the East Fork Nehalem River. The Scappoose-Vernonia road and the St. Helens-Pittsburg road join Oregon Route 47 near Pittsburg.[1] Pittsburg's elevation is 584feet.
Pittsburg was named by early area resident Peter Brous, who settled there in 1879 and built a sawmill and a gristmill.[2] Brous named the community for Pittsburgh, Pennsylvania, having formerly lived in that state.[2] The Oregon post office was established with the name "Pittsburgh" on April 17, 1879, with Brous as the postmaster.[2] The name was changed to "Pittsburg" in 1892 and the post office was discontinued in 1908.[2]