Ornacieux
# Ornacieux

Ornacieux (French pronunciation: ​) is a former commune in the Isère department in southeastern France. On 1 January 2019, it was merged into the new commune Ornacieux-Balbins.

## Population

| Year | Pop. | ±% |
| - | - | - |
| 1793 | 435 | — |
| 1806 | 482 | +10.8% |
| 1821 | 495 | +2.7% |
| 1831 | 495 | +0.0% |
| 1841 | 483 | −2.4% |
| 1851 | 509 | +5.4% |
| 1861 | 501 | −1.6% |
| 1872 | 419 | −16.4% |
| 1881 | 404 | −3.6% |
| 1891 | 377 | −6.7% |
| 1901 | 352 | −6.6% |
| 1911 | 321 | −8.8% |
| Year | Pop. | ±% |
| 1921 | 285 | −11.2% |
| 1831 | 253 | −11.2% |
| 1946 | 249 | −1.6% |
| 1954 | 223 | −10.4% |
| 1962 | 221 | −0.9% |
| 1968 | 219 | −0.9% |
| 1975 | 166 | −24.2% |
| 1982 | 191 | +15.1% |
| 1990 | 191 | +0.0% |
| 1999 | 228 | +19.4% |
| 2006 | 348 | +52.6% |
| 2011 | 402 | +15.5% |
