The 2016 Klamath Falls, Oregon, population is 21,399. There are 1,075 people per square mile (population density).
The median age is 35.9. The US median is 37.4. 46.07% of people in Klamath Falls, Oregon, are married. 16.81% are divorced.
The average household size is 2.25 people. 29.82% of people are married, with children. 20.75% have children, but are single.
76.80% of people are white, 1.47% are black, 1.27% are asian, 3.65% are native american, and 0.35% claim 'Other'.
11.87% of the people in Klamath Falls, Oregon, claim hispanic ethnicity (meaning 88.13% are non-hispanic).