Today upper merion area, King Of Prussia PA is count around 45 homes for sale at current average listing price of $598,690. Nearby neighborhoods of upper merion area are None Available, River Trail At Valley Forge, 575 South Condos, Valley Forge Tower, Stonebrook At Upper Merion, Gulph Mills Vil, River Pionte, River Pointe, Candle Brook, Deer Creek. Most of upper merion area homes are 3 bedrooms with 2 bathrooms.