thumb|Aerial view from the south of the [[Owens River and Round Valley]]
Round Valley is a census-designated place (CDP) in Inyo County, California, United States. at an elevation of 4692 feet (1430 m).<br> 1860–1870 1880-1890<br> 1900 1910 1920<br> 1930 1940 1950<br> 1960 1970 1980<br> 1990
2000 2010
Round Valley first appeared as a census designated place in the 2000 U.S. census.
The census reported that 374 people (77.6% of the population) lived in households, 11 (2.3%) lived in non-institutionalized group quarters, and 97 (20.1%) were institutionalized.
The age distribution was 91 people (18.9%) under the age of 18, 43 people (8.9%) aged 18 to 24, 172 people (35.7%) aged 25 to 44, 92 people (19.1%) aged 45 to 64, and 84 people (17.4%) who were 65years of age or older. The median age was 36.0years. For every 100 females, there were 139.8 males.
The census reported that 324 people (74.5% of the population) lived in households, no one lived in non-institutionalized group quarters and 111 (25.5%) were institutionalized.
There were 141 households, 37 (26.2%) had children under the age of 18 living in them, 67 (47.5%) were opposite-sex married couples living together, 14 (9.9%) had a female householder with no husband present, 8 (5.7%) had a male householder with no wife present. There were 16 (11.3%) unmarried opposite-sex partnerships, and 0 (0%) same-sex married couples or partnerships. 36 households (25.5%) were one person and 8 (5.7%) had someone living alone who was 65 or older. The average household size was 2.30. There were 89 families (63.1% of households); the average family size was 2.72.
The age distribution was 63 people (14.5%) under the age of 18, 29 people (6.7%) aged 18 to 24, 166 people (38.2%) aged 25 to 44, 148 people (34.0%) aged 45 to 64, and 29 people (6.7%) who were 65 or older. The median age was 39.8 years. For every 100 females, there were 155.9 males. For every 100 females age 18 and over, there were 177.6 males.
There were 155 housing units at an average density of , of which 141 were occupied, 45 (31.9%) by the owners and 96 (68.1%) by renters. The homeowner vacancy rate was 0%; the rental vacancy rate was 4.0%. 90 people (20.7% of the population) lived in owner-occupied housing units and 234 people (53.8%) lived in rental housing units.
2000
At the 2000 census, the median household income was $43,750 and the median family income was $49,688. Males had a median income of $41,500 versus $32,857 for females. The per capita income for the CDP was $21,589. 4.1% of the population and 1.7% of families were below the poverty line. None under the age of 18 and none 65 and older were living below the poverty line.
Government
In the California State Legislature, Round Valley is in , and .
In the United States House of Representatives, Round Valley is in .
Education
It is in the Round Valley Joint Elementary School District<!--ELM 33690--> for elementary school and the Bishop Unified School District<!--SEC 6021--> for grades 9-12 only.
Previously the area was in the Bishop Union High School District existed.