||This article needs additional citations for verification. (December 2007)|
|— Census-designated place —|
|Los Angeles County, California|
|Country||United States of America|
|• Total||8.729 sq mi (22.609 km2)|
|• Land||8.713 sq mi (22.566 km2)|
|• Water||0.016 sq mi (0.043 km2) 0.19%|
|Elevation||1,358 ft (414 m)|
|• Density||4,900/sq mi ( 1,900/km2)|
|Time zone||PST (UTC-8)|
|• Summer (DST)||PDT (UTC-7)|
|ZIP codes||91001, 91003|
|GNIS feature ID||1652662|
Altadena is an unincorporated area and census-designated place in Los Angeles County, California, United States, approximately 14 miles (23 km) from the downtown Los Angeles Civic Center, and directly north of the city of Pasadena, California. The population was 42,777 at the 2010 census, up from 42,610 at the 2000 census.
Benjamin Eaton (not to be confused with Coloradan politician Benjamin Eaton) first developed water sources from the Arroyo Seco and Eaton Canyon from the mid-1860s from his vineyard near the edge of Eaton Canyon. This made development of Altadena, Pasadena, and South Pasadena possible. He did the work for B.D. Wilson and Dr. John Griffin, who jointly owned the Mexican land grant of the Rancho San Pascual, about 14,000 acres (57 km2) that comprised the future sites of the three communities. They hoped to develop and sell part of this in a real estate scheme called the San Pasqual Plantation. It failed by 1870 despite the irrigation ditch Eaton engineered for the partners that drew water from around the site of present day Jet Propulsion Laboratory in the Arroyo Seco. The failure had two main causes: few believed citrus or other crops could thrive so close to the mountains, and the land was relatively inaccessible.
Eaton then tried to sell the land for the partners, and in late 1873 helped broker a deal with Daniel Berry, who represented a group of investors from Indiana to purchase 4,000 acres (16 km2) of the rancho. Although this included the land of present day Altadena, they developed the 2,500 acres (10 km2) section further south into Pasadena. In 1881, the land that became Altadena was sold to the Woodbury brothers, John and Fred, who launched the subdivision of Altadena in 1887 just as Southern California's great land boom busted. The land remained mostly agricultural. However, several millionaires (mainly from Chicago) built mansions along Mariposa Street, and a small community slowly developed through the 1890s and into the new century.
In 1880, Capt. Frederick Woodbury and his brother John Woodbury of Marshalltown, Iowa, purchased 937 acres (3.79 km2) known as the Woodbury Ranch. John Woodbury established the Pasadena Improvement Company in 1887 with a plot plan of residential development referred to as the Woodbury Subdivision. They contacted Byron O. Clark who established a nursery in the foothills in 1875 and had since moved away. He called his nursery "Altadena Nursery", a name he coined from the Spanish "alta" meaning "upper" and "dena" from Pasadena. Woodbury asked if he could use the name "Altadena" for his subdivision and Clark agreed.
The newly sprouted community of Altadena immediately began to attract millionaires from the East. In 1887 Andrew McNally, the printing magnate from Chicago and his good friend Col. G. G. Green had built mansions on what was to become Millionaire's Row, Mariposa Street near Santa Rosa Avenue. Newspaper moguls William Armiger Scripps and William Kellogg built side by side just east of Fair Oaks Avenue. A bit farther east, Zane Grey bought a home from Arthur Herbert Woodward and added a second-floor study. The famous Benziger Publishing Company built a mansion on the corner of Santa Rosa Avenue ( Christmas Tree Lane) and Mariposa. Mariposa was taken from the Spanish name for a butterfly. The grandson of Andrew McNally, Wallace Neff, became a famous Southern California architect. He started his career in Altadena with the design and construction of St. Elizabeth of Hungary Catholic Church ( parish est.1918) which was dedicated in October 1926.
Over the years Altadena has been subject to attempted annexation by Pasadena. Annexation was stopped in 1956 by community campaigns though it has been resurrected several times since by Pasadena without success. Had the annexation succeeded, Pasadena would be the 108th largest city in the United States.
While Altadena long refused wholesale annexation by neighboring Pasadena, the larger community nibbled at its edges in several small annexations of neighborhoods through the 1940s. With early 1960s redevelopment in Pasadena, the routing of extensions of 134 and 210 freeways, and lawsuits over the desegregation of Pasadena Unified School District, there was white flight and convulsive racial change in Altadena. In 1960, its black population was under four percent; over the next 15 years, half the Caucasian population left and was replaced by people of color—many of whom settled on the west side of town after being displaced by Pasadena's redevelopment and freeway projects.
The plot of the 2008 film Lakeview Terrace, starring Samuel L. Jackson, was based on real life events in Altadena involving an interracial couple, John and Mellaine Hamilton, and Irsie Henry, an African-American Los Angeles Police Officer.
According to the United States Census Bureau, the CDP has a total area of 8.7 square miles (23 km2), over 99% of it land.
The 2010 United States Census reported that Altadena had a population of 42,777. The population density was 4,900.4 people per square mile (1,892.1/km²). The racial makeup of Altadena was 22,569 (52.8%) White, 10,136 (23.7%) African American, 300 (0.7%) Native American, 2,307 (5.4%) Asian, 71 (0.2%) Pacific Islander, 4,852 (11.3%) from other races, and 2,542 (5.9%) from two or more races. Hispanic or Latino of any race were 11,502 persons (26.9%).
The Census reported that 42,276 people (98.8% of the population) lived in households, 234 (0.5%) lived in non-institutionalized group quarters, and 267 (0.6%) were institutionalized.
There were 15,212 households, out of which 5,170 (34.0%) had children under the age of 18 living in them, 7,684 (50.5%) were opposite-sex married couples living together, 2,210 (14.5%) had a female householder with no husband present, 814 (5.4%) had a male householder with no wife present. There were 661 (4.3%) unmarried opposite-sex partnerships, and 271 (1.8%) same-sex married couples or partnerships. 3,489 households (22.9%) were made up of individuals and 1,318 (8.7%) had someone living alone who was 65 years of age or older. The average household size was 2.78. There were 10,708 families (70.4% of all households); the average family size was 3.26.
The population was spread out with 9,507 people (22.2%) under the age of 18, 3,286 people (7.7%) aged 18 to 24, 10,622 people (24.8%) aged 25 to 44, 13,298 people (31.1%) aged 45 to 64, and 6,064 people (14.2%) who were 65 years of age or older. The median age was 41.8 years. For every 100 females there were 93.1 males. For every 100 females age 18 and over, there were 89.2 males.
There were 15,947 housing units at an average density of 1,826.8 per square mile (705.4/km²), of which 10,889 (71.6%) were owner-occupied, and 4,323 (28.4%) were occupied by renters. The homeowner vacancy rate was 0.9%; the rental vacancy rate was 4.9%. 30,319 people (70.9% of the population) lived in owner-occupied housing units and 11,957 people (28.0%) lived in rental housing units.
As of the census of 2000, there were 42,610 people, 14,780 households, and 10,671 families residing in the CDP. The population density was 4,898.9 people per square mile (1,891.0/km²). There were 15,250 housing units at an average density of 1,753.3 per square mile (676.8/km²). The racial makeup of the CDP was 47.30% White, 31.42% Black or African American, 0.58% Native American, 4.24% Asian, 0.13% Pacific Islander, 10.19% from other races, and 6.14% from two or more races. 20.39% of the population were Hispanic or Latino of any race.
There were 14,780 households out of which 34.1% had children under the age of 18 living with them, 52.3% were married couples living together, 15.2% had a female householder with no husband present, and 27.8% were non-families. 21.8% of all households were made up of individuals and 7.1% had someone living alone who was 65 years of age or older. The average household size was 2.82 and the average family size was 3.29.
In the CDP the population was spread out with 26.6% under the age of 18, 6.4% from 18 to 24, 30.1% from 25 to 44, 24.6% from 45 to 64, and 12.3% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 91.8 males. For every 100 females age 18 and over, there were 86.6 males.
The median income for a household in the CDP was $60,549, and the median income for a family was $66,800 (these figures had risen to $77,020 and $86,778 respectively as of a 2007 estimate). Males had a median income of $49,098 versus $38,054 for females. The per capita income for the CDP was $27,604. About 7.4% of families and 10.6% of the population were below the poverty line, including 14.1% of those under age 18 and 8.3% of those age 65 or over.
Government and politics 
Altadena is part of the County of Los Angeles and is politically run by the Los Angeles County Board of Supervisors who have executive, legislative and judicial powers. There are five members of the Board of Supervisors, elected by geographic district. Altadena is in District five, presently represented by Supervisor Michael D. Antonovich. In 1975, a group of Altadenans formed The Altadena Town Council with the help of Los Angeles County Supervisor Baxter Ward and the Pasadena Chapter of the League of Women Voters.
The Altadena Town Council acts as an ombudsman group to express to county, state and federal agencies the will and wishes of the Altadena community. Altadena is identified collectively by eight census tracts, (U.S. Census Bureau) from each of which two resident census tract representatives are elected. The Altadena Town Council meets monthly at the Altadena Community Center to provide a forum for residents and government officials to convene. The council has no legislative powers and makes no legal decisions for the community; it only operates to express consensus to governmental officials.
In the state legislature Altadena is located in the 21st Senate District, represented by Democrat Carol Liu, and in the 44th Assembly District, represented by Democrat Anthony J. Portantino. Federally, Altadena is located in California's 26th and 29th congressional districts, which have Cook PVIs of R +4 and D +12 respectively and are represented by Republican David Dreier and Democrat Adam Schiff respectively.
Government and infrastructure 
Official tree and flower 
Official tree: The Deodar Cedar (Cedrus deodara). Indigenous to the Himalayas, the deodar was brought as seeds to Altadena in 1883 by Founder John Woodbury who saw the beautiful trees in Italy. After growing the trees for two years, the trees were transplanted to Santa Rosa Avenue where they now stand majestically as Christmas Tree Lane.
Official flower: The California Golden Poppy (Eschscholzia californica). Indigenous to the southland, the golden poppy was a landmark to Spanish sailors who recognized the area by a sweeping gold carpet. The sailors referred to the marvelous vision as sabanilla de oro, or, "altar cloth of gold."
Points of interest 
Christmas Tree Lane is a 0.7-mile (1.1 km) stretch of Santa Rosa Avenue from Woodbury Road to Altadena Drive. It has been a holiday attraction since 1920 and it is the oldest large-scale outdoor Christmas lighting venue in the world. Each December, members of the Christmas Tree Lane Association  festoon the 110 still standing giant deodars that line the street with thousands of Christmas lights. Christmas Tree Lane was placed on the National Register of Historic Places in 1990, and is a California Historical Landmark.
Among Altadena's Christmas lighting attractions is the Balian Mansion, which collects worldwide tours for its Christmas lighting display. The Balian Mansion has been lighted since 1955 and is arguably the pioneer of home holiday lighting. The Balian Mansion is located just east of Allen Avenue at the 3-point junction of Mendocino Street, Mendocino Lane, and Glenview Terrace.
The historic Mount Lowe Railway was once a scenic railway that carried passengers to any of four resort hotels high in the San Gabriel Mountains above Altadena and Pasadena. Although the mountains and the remains of the railway are not strictly in Altadena, the most direct trail to the sites, the Sam Merrill Trail, starts in Altadena at the top of Lake Avenue and leads to Mount Echo, about 3 miles (4.8 km). Chaney Trail, just west of the intersection at Fair Oaks Avenue and Loma Alta Street, is a forestry service road leading to the old right of way. The Mount Lowe Railway was placed on the National Register of Historic Places in 1993.
The Cobb Estate at the top of Lake Avenue is now a free botanical garden of the United States Forest Service. It is guarded by its historic gates which are easily bypassed to allow visitors and hikers to ascend its long and winding paved driveway to the site of what was once one of Altadena's premier mansions. This is found alongside the Sam Merrill Trail which accesses Las Flores Canyon on the way to Echo Mountain.
Farnsworth Park located on Lake Avenue is a large county park that offers picnic grounds, play areas, and a club house and amphitheater. It was placed in the National Register of Historic Places in 1997.
Residents are zoned to Pasadena Unified School District schools. Zoned elementary schools include Altadena Elementary School, Burbank Elementary School, Edison Elementary School, Franklin Elementary School, Jackson Elementary School, Webster Elementary School, Aveson School of Leaders, Eliot Middle School, Muir High School, Pasadena High School, John Marshall Fundamental and Blair High School.
Notable residents 
- Al Boeke, architect and developer of Sea Ranch, California.
- Rodney King, police brutality victim
- Bob Lillis, Major League Baseball player and coach
- Paul Little, Adult Entertainment director and actor
- Jim Merritt, Major League Baseball player.
- Andre Coleman, reporter and author
- Adam Steltzner, Spacecraft Engineer.
- Richard Feynman, Physicist
- Jirayr Zorthian, Artist
- Howard Wolowitz, a character from the popular show The Big Bang Theory
See also 
- U.S. Census
- Los Angeles County publication: "Unincorporated Areas within the County of Los Angeles", Altadena listed by Los Angeles County government office, as an unincorporated city, "Los Angeles County publication: 'Unincorporated Areas within the County of Los Angeles'", verified September 27, 2010
- Los Angeles County Office of Unincorporated Area Services, Altadena listed by Los Angeles County government office, as an unincorporated area, "Los Angeles County Office of Unincorporated Area Services", verified September 27, 2010
- "CENSUS OF POPULATION AND HOUSING (1790-2000)". U.S. Census Bureau. Archived from the original on 8 July 2010. Retrieved 2010-07-17.
- US Census Bureau
- Manning, Mike. The word Altadena was first used by Byron Clark, who coined it for his nursery located south of present-day Woodbury on the west side of town. When he moved his nursery to Linda Vista, he agreed to let the Woodburys take the name for their new subdivision. "ALTADENA, CALIFORNIA: an abbreviated history for the internet." Altadena Town Council. Retrieved on March 18, 2007.
- All data are derived from the United States Census Bureau reports from the 2010 United States Census, and are accessible on-line here. The data on unmarried partnerships and same-sex married couples are from the Census report DEC_10_SF1_PCT15. All other housing and population data are from Census report DEC_10_DP_DPDP1. Both reports are viewable online or downloadable in a zip file containing a comma-delimited data file. The area data, from which densities are calculated, are available on-line here. Percentage totals may not add to 100% due to rounding. The Census Bureau defines families as a household containing one or more people related to the householder by birth, opposite-sex marriage, or adoption. People living in group quarters are tabulated by the Census Bureau as neither owners nor renters. For further details, see the text files accompanying the data files containing the Census reports mentioned above.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "Will Gerrymandered Districts Stem the Wave of Voter Unrest?". Campaign Legal Center Blog. Archived from the original on 19 February 2008. Retrieved 2008-02-10.
- "Altadena Station." Los Angeles County Sheriff's Department. Retrieved on January 21, 2010.
- "Monrovia Health Center." Los Angeles County Department of Health Services. Retrieved on March 27, 2010.
- Hevesi, Dennis (2011-11-16). "Al Boeke, Architect Who Sought Ecological Harmony, Is Dead at 88". New York Times. Retrieved 2011-12-03.
Further reading 
- The Altadena Historical Society
- Altadena Town Council
- Ives, Sarah Noble, Altadena. Pasadena, California: The Star-News Publishing Co., 1938. Out of print.
- Peterson, Robert H. Altadena's Golden Years. Alhambra, California: Sinclair Printing and Litho, Inc., 1976.
- Zack, Michele. Altadena: Between Wilderness and City. Altadena, California: Altadena Historical Society, 2004. ISBN 0-9747257-0-6
|Wikimedia Commons has media related to: Altadena, California|
- Altadena Town Council
- Altadena Chamber of Commerce
- Altadena Historical Society
- Official Altadena Timeline
- Altadena Library District
||San Gabriel Mountains||San Gabriel Mountains||San Gabriel Mountains|
|La Cañada Flintridge & JPL Arroyo Seco||Eaton Canyon & San Gabriel Mountains|
|Arroyo Seco - I-210 - Glendale||Pasadena||East Pasadena part of Pasadena|