An individual is a resident of the district if that person is domiciled in the district or if he or she maintains a place of abode in the district for an aggregate of 183 days during the year. Temporary or transitory absences from the district aren’t sufficient to abandon domicile or place of abode.
D.C. Code Ann. § 47-1801.04(42); D.C. Mun. Regs. tit. 9, § 105.6. D.C.’s code has exclusions to residency for elected officials and their staff who are domiciled in other states, and for persons who aren’t required to file U.S. tax returns, which would exclude foreign government and consular staff from filing as district residents. D.C. Code § 47-1801.04(42); Instructions to 2013 Form D-40.