Le Grand (also Legrand) at an elevation of .
Demographics
Le Grand first appeared as a census designated place in the 1990 U.S. census.
The whole population lived in households. There were 472 households, of which 43.9% had children under the age of 18 living in them. Of all households, 49.8% were married-couple households, 7.6% were cohabiting couple households, 15.0% were households with a male householder and no spouse or partner present, and 27.5% were households with a female householder and no spouse or partner present. About 16.3% of all households were made up of individuals and 7.0% had someone living alone who was 65 years of age or older. The average household size was 3.37. There were 369 families (78.2% of all households).
There were 502 housing units, of which 6.0% were vacant. Of the occupied housing units, 64.4% were owner-occupied and 35.6% were occupied by renters. The homeowner vacancy rate was 0.0% and the rental vacancy rate was 9.1%.
{| class="wikitable"
|+ Racial composition as of the 2020 census
2010 census
At the 2010 census Le Grand had a population of 1,659. The population density was . The racial makeup of Le Grand was 869 (52.4%) White, 19 (1.1%) African American, 35 (2.1%) Native American, 17 (1.0%) Asian, 1 (0.1%) Pacific Islander, 659 (39.7%) from other races, and 59 (3.6%) from two or more races. Hispanic or Latino of any race were 1,357 persons (81.8%).
The whole population lived in households, no one lived in non-institutionalized group quarters and no one was institutionalized.
There were 458 households, 246 (53.7%) had children under the age of 18 living in them, 290 (63.3%) were opposite-sex married couples living together, 74 (16.2%) had a female householder with no husband present, 27 (5.9%) had a male householder with no wife present. There were 24 (5.2%) unmarried opposite-sex partnerships, and 0 (0%) same-sex married couples or partnerships. 59 households (12.9%) were one person and 32 (7.0%) had someone living alone who was 65 or older. The average household size was 3.62. There were 391 families (85.4% of households); the average family size was 3.96.
The age distribution was 534 people (32.2%) under the age of 18, 178 people (10.7%) aged 18 to 24, 418 people (25.2%) aged 25 to 44, 367 people (22.1%) aged 45 to 64, and 162 people (9.8%) who were 65 or older. The median age was 31.5 years. For every 100 females, there were 99.4 males. For every 100 females age 18 and over, there were 94.3 males.
There were 503 housing units at an average density of 441.1 per square mile, of the occupied units 315 (68.8%) were owner-occupied and 143 (31.2%) were rented. The homeowner vacancy rate was 1.9%; the rental vacancy rate was 10.0%. 1,145 people (69.0% of the population) lived in owner-occupied housing units and 514 people (31.0%) lived in rental housing units.
Government
In the California State Legislature, Le Grand is in , and in .
In the United States House of Representatives, Le Grand is in .