  lyman is a town in york county, maine, united states. the population was 4,344 at the 2010 census. it is part of the portlandâsouth portlandâbiddeford, maine metropolitan statistical area. lyman, together with alfred, is home to massabesic experimental forest. ==history== in 1660, john sanders, john bush and peter turbat purchased from the abenaki sachem sosowen and his son fluellin what is now the township of lyman. first called swanfield, it was settled in 1767. while the original settlers are not known for certain, early records and deeds mention the following: william and jacob waterhouse (of 
Portland,_Maine_metropolitan_area Towns_in_Maine Towns_in_York_County,_Maine