Chapter designations correspond to Maryland counties, with the exception of one in Prince George’s County: Patuxent. Four chapters represent several counties. Choose a chapter close to your residence, your place of work, or where you like to bird, or select Membership-At-Large for information on joining MOS without belonging to an individual chapter. Membership in an MOS Chapter includes membership in the State organization and all MOS and chapter publications.
To join a specific chapter, find your nearest chapter by clicking on the map below.