
Lane County is the fourth most populous county (following Multnomah, Washington and Clackamas counties). Since the 1980s, population in the Eugene, Cascades & Coast region has been growing at a slow, steady rate. Eugene is the designated county seat.
In 2008, Portland State University conducted a Population Forecast for Lane County 2008-2035. This report is full of statistical information about Lane County and the Eugene-Springfield populous area.
2010 Population Estimates:
| Lane County | 351,715 |
| Coburg | 1,085 |
| Cottage Grove | 9,495 |
| Creswell | 4,845 |
| Eugene | 157,845 |
| Florence | 9,590 |
| Junction City | 5,670 |
| Lowell | 1,040 |
| McKenzie River Valley | 2,956 |
| Oakridge - Westfir | 4,105 |
| Springfield | 58,575 |
| Veneta - Fern Ridge | 5,035 |
| Source: 2010 Population Research Center, Portland State University and U.S. Census Bureau |