[7] As of the 2000 census,[13] 8,763 people, 3,047 households, and 2,227 families were residing in Jack County.

The county is dominated by agriculture (mostly ranching), which has kept population density low.

The extensive mechanization of agriculture has resulted in large farms and few workers.

A $200 million, 110 MW Keechi wind farm project with Enbridge, financed via a 20-year agreement with Microsoft, was announced in 2014.

From 2000 on, the county has become a Republican Party stronghold, with its presidential candidates winning by increasing margins in each passing election.

As a testament to how strongly Republican the county has swung, Donald Trump defeated Hillary Clinton by a margin of 79.4 percent in 2016, compared to an only 6.7 percent margin Bob Dole won the county by 20 years prior at the start of its Republican trend.