Thayer is a city located in Sangamon County Illinois. With a 2020 population of 620, it is the 827th largest city in Illinois and the 17847th largest city in the United States. Thayer is currently declining at a rate of -0.96% annually and its population has decreased by -1.90% since the most recent census, which recorded a population of 632 in 2020. Spanning over 1 miles, Thayer has a population density of 1,016 people per square mile.
The average household income in Thayer is $67,763 with a poverty rate of 5.95%. The median rental costs in recent years comes to $730 per month, and the median house value is $78,200. The median age in Thayer is 34.1 years, 32.7 years for males, and 34.4 years for females.
According to the most recent ACS, the racial composition of Thayerwas:
Rate of Home Ownership
Average Family Size
Average Household Size
The highest rate of high school graduation is among 2+ races people with a rate of 100.00%.
The highest rate of bachelors degrees is among white people with a rate of 17.44%.
100.00% of Thayer residents speak only English, while 0.00% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.00% of the population.
Overall Poverty Rate
Male Poverty Rate
Female Poverty Rate
The race most likely to be in poverty in Thayer is White, with 6.12% below the poverty level.
The race least likely to be in poverty in Thayer is Other, with NaN% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.09%. Among those working part-time, it was 14.81%, and for those that did not work, the poverty rate was 2.60%.
Number of Veterans
Veteran Poverty Rate
Veteran Disability Rate
Labor Force Participation
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Born in Thayer
100.00% of Thayer residents were born in the United States, with 85.53% having been born in Illinois. 0.00% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.