St. Clair County has the largest population in The Thumb.

The term is usually used in respect to St. Clair County, and surrounding areas.

St. Clair County also launched its first annual video and ad contest.

This company was drawn from St. Clair County, which comprised most of the modern State.

St. Clair County lies in the Detroit television market.

Soon the population of St. Clair County grew far too large for the small log cabin to be adequate as a courthouse.

Mack moved to St. Clair County in the 1840s.

In 1908 he became a candidate from St. Clair County for the next Legislature.

He was prosecuting attorney of St. Clair County in 1844.

However, it touched down again in neighboring St. Clair County, where two people were killed.