Crichton, AlabamaCrichton is a neighborhood in Mobile, Alabama consisting of North Crichton and South Crichton.PopulationAt a 2019 Census, Crichton had a population of 4,182, with 2,179 from North Crichton and 2,003 from South Crichton.HistoryCrichton is the site of the alleged Crichton Leprechaun sighting in 2006. The sighting became a significant part of Crichton's culture, and cardboard cutouts depicting the leprechaun are produced in the neighborhood.