Altamont is a census-designated place (CDP) and unincorporated community in Klamath County, Oregon, United States, southeast of Klamath Falls. As of the 2010 Census, the population was 19,257. All mailing addresses in Altamont are Klamath Falls addresses, although Altamont is outside of the city limits of Klamath Falls.
Altamont is located in southern Klamath County at 4,144 feet (1,263 m) above sea level. It is bordered to the north and west by the city of Klamath Falls, the county seat. Oregon Route 39 passes through the center of the community as South 6th Street and the Crater Lake Parkway, while Oregon Route 140 (Southside Expressway) runs along the southern edge of the community. OR 39 leads northwest into Klamath Falls and southeast 21 miles (34 km) to the California border at Hatfield, while OR 140 leads east 93 miles (150 km) to Lakeview and west 72 miles (116 km) to White City near Medford.
According to the United States Census Bureau, the Altamont CDP has a total area of 8.1 square miles (21.0 km), all land.
As of the census of 2000, there were 19,603 people, 7,777 households, and 5,420 families residing in the CDP. The population density was 2,248.5 people per square mile (868.0/km²). There were 8,315 housing units at an average density of 953.8 per square mile (368.2/km²).
The racial makeup of the CDP was:
6.76% of the population were Hispanic or Latino of any race.
There were 7,777 households out of which:
The average household size was 2.51 and the average family size was 2.96.
The age distribution was:
The median age was 38 years. For every 100 females, there were 94.9 males. For every 100 females age 18 and over, there were 90.2 males.
The median income for a household in the CDP was $31,831, and the median income for a family was $37,715. Males had a median income of $31,229 versus $22,495 for females. The per capita income for the CDP was $15,957. About 9.4% of families and 13.7% of the population were below the poverty line, including 19.4% of those under age 18 and 6.4% of those 65 or over.