The easiest way to find an adult Bible study is to visit local churches. Most churches offer Bible studies of some kind. Many nationwide Bible study groups also meet in different locations.
People who do not attend a church can check local church websites, which often list upcoming Bible studies or small groups that meet regularly. These groups may meet for several weeks, a full year or indefinitely.
Another way to find an adult Bible study is to search for a nationwide group that meets in the area. One popular group is Bible Study Fellowship, an interdenominational group that meets in locations all around the world.