Waterloo, Oregon

Waterloo, Oregon
Historic stereoscope image of the Santiam River at Waterloo
Location in Oregon
Coordinates: 44°29′41″N 122°49′27″W / 44.49472°N 122.82417°W / 44.49472; -122.82417
CountryUnited States
StateOregon
CountyLinn
Incorporated1893
Government
  MayorJustin Cary
Area
  Total
0.12 sq mi (0.31 km2)
  Land0.12 sq mi (0.31 km2)
  Water0.00 sq mi (0.00 km2)
Elevation
404 ft (123 m)
Population
 (2020)
  Total
222
  Density1,834.71/sq mi (706.72/km2)
Time zoneUTC-8 (Pacific)
  Summer (DST)UTC-7 (Pacific)
ZIP code
97355
Area code(s)458 and 541
FIPS code41-79050
GNIS feature ID2413454

Waterloo is a city in Linn County, Oregon, United States. The population was 229 at the 2010 census.

The city's name, a joking reference to the Battle of Waterloo, stemmed from a 19th-century court decision that settled a land dispute at Kees Mill along the South Santiam River. After the dispute ended, Kees Mill became known as Waterloo.

The federal government established a post office at Waterloo on January 5, 1875. S. D. Granger was its first postmaster. The post office closed in 1974.