Mid-America Apartment Communities, Inc. is a multifamily focused, self-administered and self-managed real estate investment trust (REIT). The Company owns, operates, acquires and develops apartment communities primarily located in the Southeast and Southwest regions of the United States. It operates through three segments: Large market same store, Secondary market same store and Non-Same Store and Other. Its Large market same store communities are communities in markets with a population of at least one million and at least 1% of the total public multifamily REIT units that it has owned. Its Secondary market same store communities are communities in markets with populations of more than one million but less than 1% of the total public multifamily REIT units or markets with populations of less than one million that it has owned. Its Non-same store communities and other includes recent acquisitions and communities in development or lease-up communities.