I'm a female 19 5'5 and weigh 110lbs. To maintain weight with no/little excercise what diet works. Moderate diet, zone diet, low fat/carb diet? Help!

Diet. Diet is a key in weight control but when you are so close to ideal body weight you need some exercise to maintain metabolic rate and muscle mass. Otherwise your body will simply slow metabolic rate and you will not feel or perform well and may not lose weight. More lean muscle burns more calories and makes it easier to keep weight off. If you don't build muscle you may add fat when gaining.
See below. Check website: http://www.Freedieting.Com/tools/calorie_calculator.Htm for data u gave, 1531 cal/day are adequate for weight maintenance. Follow healthy diet: lean meats, fruits & veggies, whole grains, good fats, low-fat dairy; avoid fast foods & sugary drinks; avoid high glycemic starches like white bread/rice/pasta/ potatoes & sugar-laden desserts.