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Emerald Hills

Emerald Lake Hills or Emerald Hills is a census-designated place and neighborhood in unincorporated San Mateo County, in the state of California, USA. Situated among oak-studded hills between Woodside, Redwood City, and San Carlos roughly bounded by Edgewood Road, Alameda de las Pulgas, Farm Hill Boulevard, and Interstate 280. The population was 4,278 at the 2010 census and the per-capita income was $68,966, making it the 22nd wealthiest place in California and the 82nd wealthiest place (with a population over 1,000) in the United States

Emerald Lake Hills was originally conceived as a resort community for city-weary San Franciscans during World War I. Emerald Lake Hills actually consists of two large subdivisions created around 1920: Emerald Lake (even though there are two lakes) and Emerald Hills. Residents refer to the area by either Emerald Hills or by Emerald Lake Hills. The name Emerald Hills is now more commonly adopted due to mailing designation rules, as the U. S. Post Office would allow only a two-word name.

According to an interview with Yuji Naka, Emerald Hills is the namesake for the famous Emerald Hill Zone, the first level of Sonic the Hedgehog 2.



The 2010 United States Census reported that Emerald Lake Hills had a population of 4,278. The population density was 3,557.4 people per square mile. The racial makeup of Emerald Lake Hills was 3,655 (85.4%) White, 39 (0.9%) African American, 5 (0.1%) Native American, 322 (7.5%) Asian, 15 (0.4%) Pacific Islander, 56 (1.3%) from other races, and 186 (4.3%) from two or more races. Hispanic or Latino of any race were 288 persons (6.7%).

The Census reported that 4,252 people (99.4% of the population) lived in households, 26 (0.6%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.

There were 1,550 households, out of which 554 (35.7%) had children under the age of 18 living in them, 1,106 (71.4%) were opposite-sex married couples living together, 82 (5.3%) had a female householder with no husband present, 43 (2.8%) had a male householder with no wife present. There were 66 (4.3%) unmarried opposite-sex partnerships, and 22 (1.4%) same-sex married couples or partnerships. 212 households (13.7%) were made up of individuals and 80 (5.2%) had someone living alone who was 65 years of age or older. The average household size was 2.74. There were 1,231 families (79.4% of all households); the average family size was 3.03.

The population was spread out with 976 people (22.8%) under the age of 18, 222 people (5.2%) aged 18 to 24, 845 people (19.8%) aged 25 to 44, 1,682 people (39.3%) aged 45 to 64, and 553 people (12.9%) who were 65 years of age or older. The median age was 46.0 years. For every 100 females there were 99.1 males. For every 100 females age 18 and over, there were 97.3 males.

There were 1,614 housing units at an average density of 1,342.1 per square mile (518.2/km²), of which 1,402 (90.5%) were owner-occupied, and 148 (9.5%) were occupied by renters. The homeowner vacancy rate was 1.1%; the rental vacancy rate was 7.4%. 3,873 people (90.5% of the population) lived in owner-occupied housing units and 379 people (8.9%) lived in rental housing units.


Residents are zoned to primary schools in the Redwood City School District and secondary schools in the Sequoia Union High School District.

Elementary school children who choose to attend their neighborhood school in the northern half of the CDP attend Clifford School, while those in the southern half attend Roy Cloud School. Children may also attend schools with specialized focus, like North Star Academy (academics), or Adelante (Spanish immersion).

Most high school children in Emerald Lake Hills are assigned to Woodside High School, but may request transfer to any Sequoia Union District school or apply to public charter high schools like Summit or Everest


For additional info visit Wikipedia:,_California



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