The United States of America seems to be its origin and home. 'The registrant is the parent company of Dollar Tree Stores, Inc., a retail company, Dollar Tree Distribution, Inc., a distributionand warehousing company and Greenbrier International, Inc, a sourcing company. Dollar Tree Management, Inc., a management services company is a subsidiary of Dollar Tree Stores, Inc. Dollar Tree Stores, Inc., Dollar Tree Distribution, Inc. and Dollar Tree Management, Inc. are Virginia companies. Greenbrier International, Inc. is a Delaware company. The registrant also indirectly holds an interest in Dollar Tree Stores Canada, Inc., a British Columbia company. Certain other subsidiaries are not included because, when considered in the aggregate as a single subsidiary, they do not constitute a significant subsidiary as of February 2, 2013.' -from Exhibit 21.1 of
https://www.sec.gov/Archives/edgar/data/935703/000093570318000013/dltr-2018x02x03x10kxex211.htm
Greenbrier International Inc. has its registered headquarters at 500 Volvo Parkway in Chesapeake, Virginia, which is exactly the same address as that qiven for Dollar Tree Stores. The Dollar Tree website traces its origins to a store in Norfolk, Virginia in the 1950s. 'Dollar Tree's corporate headquarters is located at: 500 Volvo Parkway, Chesapeake, Virginia 23320. ...Dollar Tree's common stock has been traded on the NASDAQ Stock Market, under the symbol "DLTR", since our initial public offering on March 6, 1995.' -See
http://www.zapconnect.com/companies/index.cfm/fuseaction/companies_detail/eregnum/3005269673.html
http://www.dollartree.com/investors/faqs