Within the state of Maryland, Frederick County has the lowest assisted living prices. Nearby Cumberland has a similar cost of $4,665 per month. At $5,000 per month, costs in Baltimore are on par with the state average. Salisbury is more expensive, averaging $5,500 per month. Located next to the Chesapeake Bay, California has the highest assisted living prices in the state. At $6,200, it is $1,700 per month more expensive than Mercer County. Costs are similar in neighboring Pennsylvania, where the Philadelphia area has an average assisted living cost of $5,550 per month. Pittsburgh, however, is more affordable, with a monthly median price of $3,550. Assisted living in Scranton is even cheaper, averaging $2,450 per month.