|o Total||1.547 sq mi (4.007 km2)|
|o Land||1.547 sq mi (4.007 km2)|
|o Water||0 sq mi (0 km2) 0%|
|Elevation||151 ft (46 m)|
|o Density||330/sq mi (130/km2)|
Madison (formerly Cache Creek) is a census-designated place (CDP) in Yolo County, California. Madison's ZIP Code is 95653 and its area code 530. It is located 10.5 miles (17 km) west of Woodland, at an elevation of 151 feet (46 m). The 2010 United States census reported Madison's population was 503.
The Cache Creek post office opened in 1852, moved and changed its name to Madison in 1877. The name was bestowed by Daniel Bradley Hulbert after his hometown, Madison, Wisconsin. The townsite was laid out and named "Madison" in 1877 when the railroad, the Vaca Valley and Clear Lake Railroad, reached that spot, as the terminus, after expanding north from Winters. The Cache Creek Post Office had been located in the settlement of Cottonwood, approximately one mile south of Madison. Many of Cottonwood's structures were then moved to Madison, as Cottonwood did not have a railroad stop.
According to the United States Census Bureau, the CDP covers an area of 1.547 square miles (4.007 km²), all of it land.
The 2010 United States Census reported that Madison had a population of 503. The population density was 325.1 people per square mile (125.5/km²). The racial makeup of Madison was 224 (44.5%) White, 1 (0.2%) African American, 8 (1.6%) Native American, 3 (0.6%) Asian, 3 (0.6%) Pacific Islander, 235 (46.7%) from other races, and 29 (5.8%) from two or more races. Hispanic or Latino of any race were 384 persons (76.3%).
The Census reported that 501 people (99.6% of the population) lived in households, 2 (0.4%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.
There were 135 households, out of which 71 (52.6%) had children under the age of 18 living in them, 77 (57.0%) were opposite-sex married couples living together, 20 (14.8%) had a female householder with no husband present, 12 (8.9%) had a male householder with no wife present. There were 9 (6.7%) unmarried opposite-sex partnerships, and 1 (0.7%) same-sex married couples or partnerships. 16 households (11.9%) were made up of individuals and 5 (3.7%) had someone living alone who was 65 years of age or older. The average household size was 3.71. There were 109 families (80.7% of all households); the average family size was 4.14.
The population was spread out with 155 people (30.8%) under the age of 18, 55 people (10.9%) aged 18 to 24, 130 people (25.8%) aged 25 to 44, 120 people (23.9%) aged 45 to 64, and 43 people (8.5%) who were 65 years of age or older. The median age was 28.6 years. For every 100 females, there were 113.1 males. For every 100 females age 18 and over, there were 110.9 males.
There were 141 housing units at an average density of 91.1 per square mile (35.2/km²), of which 86 (63.7%) were owner-occupied, and 49 (36.3%) were occupied by renters. The homeowner vacancy rate was 0%; the rental vacancy rate was 3.9%. 326 people (64.8% of the population) lived in owner-occupied housing units and 175 people (34.8%) lived in rental housing units.