Lakehead is a census-designated place in Shasta County, California. Lakehead sits at an elevation of 1,447 feet. Lakehead is located halfway between Los Angeles; the 2010 United States census reported Lakehead's population was 461. Lakehead was established as a CDP for the 2010 census, replacing part of Lakehead-Lakeshore, California CDP. In 2018, the western part of Lakehead was closed to the public due to the Carr Fire. According to the United States Census Bureau, the CDP covers an area of 5.3 square miles, 4.7 square miles of it is land, 0.6 square miles of it is water. According to the Köppen Climate Classification system, Lakehead has a warm-summer Mediterranean climate, abbreviated "Csa" on climate maps; the 2010 United States Census reported that 461 people, 228 households, 134 families resided in the CDP. The population density was 87.3 people per square mile. There were 347 housing units at an average density of 65.7 per square mile. The racial makeup of the CDP was 91.3% White, 2.8% Native American, 0.4% Asian, 0.7% from other races, 4.8% from two or more races.

2.4 % of the population was Latino of any race. The Census reported. There were 228 households out of which 11.4% had children under the age of 18 living in them, 47.8% were opposite-sex married couples living together, 7.5% had a female householder with no husband present, 3.5% had a male householder with no wife present. 4.4% of households were unmarried opposite-sex partnerships and 2.2% were same-sex married couples or partnerships. 32.0% of households were made up of individuals and 14.0% had someone living alone, 65 years of age or older. The average household size was 2.02. The average family size was 2.51. The population was spread out with 9.1% under the age of 18, 5.6% aged 18 to 24, 9.5% aged 25 to 44, 46.9% aged 45 to 64, 28.9% who were 65 years of age or older. The median age was 57.7 years. For every 100 females, there were 114.4 males. For every 100 females age 18 and over, there were 111.6 males. There were 347 housing units of which 80.3% were owner-occupied and 19.7% were occupied by renters.

The homeowner vacancy rate was 5.6%. 75.3% of the population lived in owner-occupied housing units and 24.7% lived in rental housing units. As of March 2019 there were over 700 registered voters in Lakehead. In the state legislature Lakehead is in the 1st Senate District, represented by Republican Brian Dahle, the 1st Assembly District, represented by Republican Megan Dahle. Federally, Lakehead is in California's 1st congressional district, represented by Republican Doug LaMalfa

Windex is a glass and hard-surface cleaner. Windex was invented by the Drackett Company in 1933 and has been marketed throughout the intervening decades—originally in glass containers in plastic ones. Drackett sold the Windex brand to Bristol-Meyers in 1965. S. C. Johnson has been manufacturing it since; the original Windex was light blue. Today there are varieties marketed in several colors and fragrances, with a number of additives such as vinegar, lime, or orange juice. On August 26, 1969, Melvin E. Stonebraker and Samuel P. Wise received U. S. patent #3,463,735 for a glass cleaning composition, listing example formulae, one of, 4.0% isopropyl alcohol, 1% ethylene glycol monobutyl ether, 0.1% sodium lauryl sulfate, calcium 0.01%, tetrasodium pyrophosphate, 0.05% of 28% ammonia, 1% of a dye solution, 0.01% perfume. This formula was not only inexpensive to manufacture but allowed the product to be packaged in glass bottles and dispensed with a plastic sprayer. In 1989, Windex was a 5% ammonia solution.

The product was reformulated in 2006. In 2009, S. C. Johnson started publishing ingredients including Windex; the S. C. Johnson website lists Windex's ingredients as water, 2-hexoxyethanol, sodium dodecylbenzene sulfonate, lauramine oxide, ammonium hydroxide and Liquitint sky blue dye. "Don’t Let the Blue Fool You: New Logo on Windex® Bottle to Highlight Company's Greenlist™ Process", S. C. Johnson press release, Wisconsin, January 17, 2008 "Philip W. Drackett: Earned profits, plaudits" by Barry M. Horstman, Cincinnati Post, May 21, 1999. Windex's official website Common Household Product Material Safety and Data Sheets