Население Сили: демографический обзор

The first post office at Seeley was opened in 1909.

The 2010 United States Census reported that Seeley had a population of 1,823. The population density was The racial makeup of Seeley was 746 (42.9%) White, 19 (1.1%) African American, 7 (0.4%) Native American, 21 (1.2%) Asian, 2 (0.1%) Pacific Islander, 793 (45.6%) from other races, and 151 (8.7%) from two or more races. Hispanic or Latino of any race were 1,489 persons (85.6%). The Census reported that 1,823 people (100% of the population) lived in households, 0 (0%) lived in non institutionalized group quarters, and 0 (0%) were institutionalized. There were 493 households, out of which 276 (56.0%) had children under the age of 18 living in them, 268 (54.4%) were opposite sex married couples living together, 114 (23.1%) had a female householder with no husband present, 28 (5.7%) had a male householder with no wife present. There were 40 (8.1%) unmarried opposite sex partnerships, and 2 (0.4%) same sex married couples or partnerships. 66 households (13.4%) were made up of individuals, and 27 (5.5%) had someone living alone who was 65 years of age or older. The average household size was 3.53. There were 410 families (83.2% of all households); the average family size was 3.83. The population was spread out, with 577 people (33.2%) under the age of 18, 195 people (11.2%) aged 18 to 24, 421 people (24.2%) aged 25 to 44, 373 people (21.4%) aged 45 to 64, and 173 people (9.9%) who were 65 years of age or older. The median age was 28.5 years. For every 100 females, there were 95.4 males. For every 100 females age 18 and over, there were 85.3 males. There were 556 housing units at an average density of , of which 49e were occupied, of which 246 (49.9%) were owner occupied, and 247 (50.1%) were occupied by renters. The homeowner vacancy rate was 5.3%; the rental vacancy rate was 10.5%. 892 people (51.3% of the population) lived in owner occupied housing units and 847 people (48.7%) lived in rental housing units.

As of the census of 2000, there were 1,624 people, 438 households, and 382 families residing in the CDP. The population density was There were 460 housing units at an average density of The racial makeup of the CDP was 54.7% White, 0.7% Black or African American, 1.0% Native American, 2.3% Asian, 0.1% Pacific Islander, 35.9% from other races, and 5.2% from two or more races. 81.5% of the population were Hispanic or Latino of any race. There were 438 households, out of which 54.8% had children under the age of 18 living with them, 66.4% were married couples living together, 16.4% had a female householder with no husband present, and 12.6% were non families. 9.8% of all households were made up of individuals, and 4.8% had someone living alone who was 65 years of age or older. The average household size was 3.7 and the average family size was 4.0. In the CDP, the population was spread out, with 38.2% under the age of 18, 8.7% from 18 to 24, 28.8% from 25 to 44, 17.1% from 45 to 64, and 7.1% who were 65 years of age or older. The median age was 27 years. For every 100 females, there were 96.6 males. For every 100 females age 18 and over, there were 88.2 males. The median income for a household in the CDP was $31,058, and the median income for a family was $31,667. Males had a median income of $28,654 versus $20,625 for females. The per capita income for the CDP was $9,539. About 22.2% of families and 26.3% of the population were below the poverty line, including 36.0% of those under age 18 and 18.0% of those age 65 or over.

In the state legislature, Seeley is in , and
Federally, Seeley is in .

Seeley County Water District, a special district, provides water and sewer service to Seeley.