2017 Growth Rate
-1.57%
County Website
State
Founded
August 25, 1855
County Seat
Manhattan
Lat/Lng
Riley County, Kansas's estimated population is 73,982 with a growth rate of -1.57% in the past year according to the most recent United States census data. Riley County, Kansas is the 7th largest county in Kansas.
| Year | Population | Growth | Growth Rate |
| 2018 | 73,703 | -279 | -0.38% |
| 2017 | 73,982 | -1,181 | -1.57% |
| 2016 | 75,163 | -1,986 | -2.57% |
| 2015 | 77,149 | 664 | 0.87% |
| 2014 | 76,485 | -451 | -0.59% |
| 2013 | 76,936 | -563 | -0.73% |
| 2012 | 77,499 | 4,080 | 5.56% |
| 2011 | 73,419 | 1,866 | 2.61% |
| 2010 | 71,553 | 4,414 | 6.57% |
| 1990 | 67,139 | 3,634 | 5.72% |
| 1980 | 63,505 | 6,717 | 11.83% |
| 1970 | 56,788 | 14,874 | 35.49% |
| 1960 | 41,914 | 8,509 | 25.47% |
| 1950 | 33,405 | 12,788 | 62.03% |
| 1940 | 20,617 | 735 | 3.70% |
| 1930 | 19,882 | -768 | -3.72% |
| 1920 | 20,650 | 4,867 | 30.84% |
| 1910 | 15,783 | 1,955 | 14.14% |
| 1900 | 13,828 | 645 | 4.89% |
| 1890 | 13,183 | 2,753 | 26.40% |
| 1880 | 10,430 | 5,325 | 104.31% |
| 1870 | 5,105 | 3,881 | 317.08% |
| 1860 | 1,224 | 0.00% |
| Race | Population | Percentage |
| White | 62,321 | 82.33% |
| Black or African American | 4,903 | 6.48% |
| Asian | 3,723 | 4.92% |
| Two or More Races | 3,170 | 4.19% |
| Some Other Race | 1,009 | 1.33% |
| American Indian and Alaska Native | 406 | 0.54% |
| Native Hawaiian and Other Pacific Islander | 164 | 0.22% |
24.9
24.7
25.6
There are 62,919 adults, (6,256 of whom are seniors) in Riley County, Kansas.
Female
35,286
46.62%
Male
40,410
53.38%
| Type | Count | Average Size | Owned |
| All | 26,686 | 2.46 | 42.3 |
| Non Family | 12,127 | 1.8 | 23.7 |
| Married | 11,885 | 2.96 | 63.3 |
| Female | 1,928 | 3.26 | 31.2 |
| Male | 746 | 3.11 | 37.5 |
| Education Attained | Count | Percentage |
| Less Than 9th Grade | 495 | 1.31% |
| 9th to 12th Grade | 1,061 | 2.82% |
| High School Graduate | 6,569 | 17.45% |
| Some College | 9,393 | 24.95% |
| Associates Degree | 2,994 | 7.95% |
| Bachelors Degree | 9,250 | 24.57% |
| Graduate Degree | 7,886 | 20.95% |
| Name | Total | High School | Bachelors |
| White | 29,899 | 29,009 | 14,173 |
| Hispanic | 2,753 | 2,389 | 700 |
| Black | 2,432 | 2,248 | 730 |
| Asian | 1,880 | 1,767 | 1,254 |
| Multiple Races | 852 | 802 | 259 |
| Other Race | 697 | 579 | 164 |
| Native American | 217 | 198 | 93 |
| Islander | 43 | 33 | 18 |
The highest rate of high school graduation is among white people with a rate of 97.02%.
The highest rate of bachelors degrees is among asian people with a rate of 66.70%.
$35,569
Average Earnings
$40,498
Average Male
$30,575
Average Female
89.73% of Riley County, Kansas residents speak only English, while 10.27% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 3.37% of the population.
| Name | Total | In Poverty | Poverty Rate |
| White | 51,091 | 10,954 | 21.44% |
| Hispanic | 5,070 | 1,164 | 22.96% |
| Asian | 3,376 | 1,132 | 33.53% |
| Multiple | 2,787 | 653 | 23.43% |
| Black | 4,080 | 592 | 14.51% |
| Other | 1,009 | 382 | 37.86% |
| Native | 378 | 166 | 43.92% |
| Islander | 75 | 48 | 64.00% |
22.00%
Overall Poverty Rate
20.13%
Male Poverty Rate
23.95%
Female Poverty Rate
The race most likely to be in poverty in Riley County, Kansas is Islander, with 64.00% below the poverty level.
The race least likely to be in poverty in Riley County, Kansas is Black, with 14.51% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 3.65%. Among those working part-time, it was 45.06%, and for those that did not work, the poverty rate was 31.35%.
39.2%
Overall Marriage Rate
37.0%
Male Marriage Rate
41.8%
Female Marriage Rate
The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.
| Name | Veterans | % of Total |
| White | 4,573 | 9.65% |
| Black | 591 | 19.33% |
| Hispanic | 417 | 11.94% |
| 2 or More | 148 | 9.24% |
| Asian | 42 | 1.35% |
| Other | 26 | 3.64% |
| Indian | 24 | 7.95% |
7.19%
Veteran Poverty Rate
23.35%
Veteran Disability Rate
69.3%
Labor Force Participation
55.7%
Employment Rate
5.6%
Unemployment Rate
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
91.75%
Native Born
8.25%
Foreign Born
5.82%
Non Citizen
91.75% of Riley County, Kansas residents were born in the United States, with 45.31% having been born in Kansas. 5.82% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.
| City | 2010 Census | 2016 Estimated | Growth | Growth Rate |
| Manhattan | 52302 | 54983 | 2681 | 5.13% |
| Ogden | 2087 | 2022 | -65 | -3.11% |
| Riley | 958 | 972 | 14 | 1.46% |
| Leonardville | 450 | 440 | -10 | -2.22% |
| Randolph | 163 | 163 | 0 | 0.00% |