| Official Name: | Theon, Washington |
| Pushpin Map: | Washington#USA |
| Pushpin Label: | Theon |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Washington |
| Subdivision Type2: | County |
| Subdivision Name2: | Asotin |
| Established Title: | Established |
| Established Date: | 1884 |
| Timezone: | Pacific (PST) |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Postal Code Type: | ZIP code |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
Theon was a town in Asotin County, Washington.
Established in 1884, Theon was named after Daniel Theon Welch, a local merchant.[1] A post office called Theon operated from 1880 to 1909.[2]
| 1910 | 251 | — | ||
|---|---|---|---|---|
| 1920 | 1,859 | 47.9% | ||
| 1930 | 2,870 | 54.4% | ||
| 1940 | 3,116 | 8.6% | ||
| 1950 | 5,617 | 80.3% | ||
| 1960 | 6,209 | 10.5% | ||
| 1970 | 6,312 | 1.7% | ||
| 1980 | 6,903 | 9.4% | ||
| 1990 | 6,753 | −2.2% | ||
| 2000 | 7,337 | 8.6% | ||
| 2010 | 7,229 | −1.5% | ||
| 2020 | 7,161 | −0.9% |