Jack is an unincorporated community in Coffee County, Alabama, United States. Jack is located on Alabama State Route 87, 11.7 miles north …Jack is an unincorporated community in Coffee County, Alabama, United States. Jack is located on Alabama State Route 87, 11.7 miles north-northeast of Elba. Jack has a post office with ZIP code 36346. Jack has a single K-12 school, Zion Chapel. There are 1,379 residents in Jack, with a median age of 44.9. Of this, 46.56% are males and 53.44% are females. A total of 1,175 people in Jack currently live in the same house as they did last year.