Thelma Lou is Barney Fife's girlfriend on The Andy Griffith Show. Thelma Lou's last name and occupation are never revealed, however in one episode she mentions getting back to the office. Her two cousins are Mary Grace Gossage and Karen Moore. She lives in a small, quaint home within Mayberry city limits - making Barney's ice cream deliveries much quicker. Read More... File:Green Featured articlel.png File:DictionarySign2.png The Andy Griffith Show Dictionary— __NOEDITSECTION__