Today upper merion, King Of Prussia PA is count around 26 homes for sale at current average listing price of $682,310. Nearby neighborhoods of upper merion are None Available, River Trail At Valley Forge, Stonebrook At Upper Merion, Valley Forge Tower, 575 South Condos, Brownstones At Vf, Candle Brook, Cinnamon Hill, King Of Prussia, Overlook At Town Center. Most of upper merion homes are 3 bedrooms with 3 bathrooms.