The US Bureau of the Census has reams of info about housing matters. You might start at
http://www.census.gov/hhes/www/housing.html The American Community Survey (ACS) branch of the census does yearly sampling so you might get more recent info there; click through from
www.census.gov.
("Place" is the census category for a city/town (not metro region) if it is important to see data by local jurisdiction.)
MLS data is skewed because it is based on actual sales, not values of homes and what they WOULD sell for if on the market. It can also be skewed if a big development comes onto the market at a particular time.
You should also be able to get city/town median home VALUE from the assessors department in the local jurisdiction.