Population & Demographics

With a population of roughly 15,600 and shrinking, the county faces a compounding demographic challenge: more residents are dying than being born, and more people are leaving than arriving. District-wide data shows the four-county region lost about 1,600 people between 2010 and 2020, with Trinity among the three counties that declined — only Shasta held steady through net migration. The county's 3,322 total jobs and a 3.1% employment decline over the past five years suggest the economic base isn't generating enough pull to retain or attract working-age residents.

The aging trend is the most pressing signal. The 65+ population grew 25.3% across the district, and Trinity County's demographics skew older than the region overall. At the same time, significant losses in the 10–19 and 45–54 age groups point to families leaving and young people not coming back after school. The projected 5% employment growth over the next five years offers a narrow window — if the county can pair that job growth with housing and quality-of-life investments, it has a shot at retaining the remote workers and younger adults (20–34) who did move in during the COVID period. Without deliberate retention strategy, the county risks accelerating into a demographic spiral where fewer workers support a growing senior population.