Duncan, OK Historical Language Spoken at Home Data
ACS 2010-2014 data
Total population: 23,364
| Duncan, OK | % | Oklahoma | U.S. | |
| English | 8,543 | 89.59%, see rank | 90.04% | 79.39% |
| Spanish | 791 | 8.29%, see rank | 6.10% | 11.75% |
| Other Indo-European Languages | 89 | 0.93%, see rank | 1.39% | 4.52% |
| Asian and Pacific Islander Languages | 69 | 0.72%, see rank | 1.50% | 3.36% |
| Other | 44 | 0.46%, see rank | 0.97% | 0.99% |
ACS 2008-2012 data
Total population: 23,332
| Duncan, OK | % | Oklahoma | U.S. | |
| English | 8,615 | 89.03%, see rank | 90.40% | 79.64% |
| Spanish | 813 | 8.40%, see rank | 5.86% | 11.57% |
| Other Indo-European Languages | 116 | 1.20%, see rank | 1.42% | 4.61% |
| Asian and Pacific Islander Languages | 102 | 1.05%, see rank | 1.39% | 3.24% |
| Other | 30 | 0.31%, see rank | 0.93% | 0.94% |
ACS 2006-2010 data
Total population: 23,157
| Duncan, OK | % | Oklahoma | U.S. | |
| English | 8,683 | 90.12%, see rank | 90.66% | 79.95% |
| Spanish | 744 | 7.72%, see rank | 5.67% | 11.42% |
| Other Indo-European Languages | 130 | 1.35%, see rank | 1.38% | 4.60% |
| Asian and Pacific Islander Languages | 59 | 0.61%, see rank | 1.36% | 3.14% |
| Other | 19 | 0.20%, see rank | 0.93% | 0.89% |
ACS 2005-2009 data
Total population: 22,354
| Duncan, OK | % | Oklahoma | U.S. | |
| English | 8,649 | 92.35%, see rank | 90.76% | 80.35% |
| Spanish | 572 | 6.11%, see rank | 5.58% | 11.21% |
| Other Indo-European Languages | 70 | 0.75%, see rank | 1.43% | 4.62% |
| Asian and Pacific Islander Languages | 65 | 0.69%, see rank | 1.28% | 2.95% |
| Other | 9 | 0.10%, see rank | 0.95% | 0.87% |
US Census 2000 data
Total population: 22,505
| Duncan, OK | % | Oklahoma | U.S. | |
| English | 8,722 | 92.46%, see rank | 90.76% | 81.14% |
| Spanish | 578 | 6.13%, see rank | 5.04% | 10.21% |
| Other Indo-European Languages | 110 | 1.17%, see rank | 1.84% | 5.22% |
| Asian and Pacific Islander Languages | 4 | 0.04%, see rank | 1.20% | 2.61% |
| Other | 19 | 0.20%, see rank | 1.17% | 0.82% |
* ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.