Templeton is located at . It is approximately five miles south of Paso Robles and five miles (8 km) north of Atascadero along U.S. 101. State Route 46 intersects U.S. 101 on the north edge of the town.(35.553847, -120.709469)
According to the United States Census Bureau, the CDP has a total area of 4.7 square miles (12.3 km²), all of it land. However, much of the surrounding unincorporated area between Atascadero and Paso Robles also considers itself part of Templeton, and U.S. mail is addressed likewise.
Templeton has a Mediterranean climate that is characterized by mild winters and dry summers. The area usually has low humidity. Rain generally falls only between November and March, with the rainy season tapering off almost completely by the end of April. Temperature lows can reach from 10 to 15 °F (−9 °C) in the winter, and highs reaching up to 115 °F (46 °C) in the summer.
Templeton is home to businesses that serve the local ranching and agriculture, including horse ranches and vineyards.
Templeton is emerging as a world class wine producer; many of the wineries with the "Paso Robles" appellation are actually located in the unicorporated Templeton area - including Castoro, Peach Canyon, York Mountain, and Wild Horse.
A very limited number of large corporations have made Templeton their primary place of business. Major businesses that operate with primary locations in Templeton include Weyrick Lumber, Santa Margarita Construction Corp (SMCC) and Castoro Cellars, Peachy Canyon Winery, York Mountain Winery, Wild Horse Winery amongst other wineries.
Templeton was founded in 1886 when C.H. Phillips of the West Coast Land Company sent R.R. Harris to survey 160 acres (0.65 km2) south of Paso Robles. This acreage was to be laid out in business and residential lots and 5-12 acre parcels for a town named "Crocker" after Charles Crocker, which was later changed to "Templeton", after Crocker's son. The town was the end of the line for passengers coming via railroad from the north; tourists disembarked here and took a stagecoach south to San Luis Obispo. In 1891 the railroad continued south and the town was reduced to a flag stop and is now a bypass. In 1897 there was a great fire which burned most of the business district. The town was rebuilt, but much smaller than it had once been.
Templeton, CA is a small, rural town, but it is growing fast. It has added dwelling units faster since 1990 than any other community in the county (a 63% increase), with developments competing for prime land with vineyards.
As of the census of 2000, there were 4,687 people, 1,548 households, and 1,247 families residing in the CDP. The population density was 989.2 people per square mile (381.8/km²). There were 1,588 housing units at an average density of 335.2/sq mi (129.4/km²). The racial makeup of the CDP was 90.36% White, 1.17% African American, 0.70% Native American, 0.92% Asian, 0.09% Pacific Islander, 3.63% from other races, and 3.14% from two or more races. Hispanic or Latino of any race were 11.82% of the population.
There were 1,548 households out of which 49.7% had children under the age of 18 living with them, 65.4% were married couples living together, 11.5% had a female householder with no husband present, and 19.4% were non-families. 15.6% of all households were made up of individuals and 7.8% had someone living alone who was 65 years of age or older. The average household size was 2.98 and the average family size was 3.33.
In the CDP the population was spread out with 33.7% under the age of 18, 5.9% from 18 to 24, 29.8% from 25 to 44, 19.2% from 45 to 64, and 11.5% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 93.2 males. For every 100 females age 18 and over, there were 88.4 males.
The median income for a household in the CDP was $53,438, and the median income for a family was $58,750. Males had a median income of $41,268 versus $32,034 for females. The per capita income for the CDP was $19,671. About 6.3% of families and 9.1% of the population were below the poverty line, including 11.5% of those under age 18 and 4.7% of those age 65 or over.
In the state legislature Templeton is located in the 15th Senate District, represented by Republican Abel Maldonado, and in the 33rd Assembly District, represented by Republican Sam Blakeslee. Federally, Templeton is located in California's 22nd congressional district, which has a Cook PVI of R +16 and is represented by Republican Kevin McCarthy.
Templeton High School was selected as a National Blue Ribbon High School in 2006 and was selected as one of 64 schools out of 860 in the state as a California Distinguished School in 1999 and again in 2005.
Notable residents of Templeton include:
There are many small town community events that take place in Templeton. Such events include the widely popular Summer Concerts In The Park, Summer Movie Nights at the Park, Wine & Roses Bike Ride, the Outdoor Quilt Show, the annual Cowboy Christmas and Denim & Diamonds Charity Event, and the county's biggest Farmer's Market every Saturday morning.
Many wineries operate the Templeton part of North San Luis Obispo County wine country.
Twin Cities Community Hospital is located in Templeton, that provides services to most of North San Luis Obispo County. Templeton has seen a great growth in medical services and buildings along Las Tablas road. The four largest parts of the economy are the hospital, the school, the wine and agriculture brought in from the country-side, and the businesses on Main Street.