Below are a list of the cities located in District Of Columbia County, DC. There are 293 total unique zip codes in District Of Columbia County, District Of Columbia. The time zone for District Of Columbia County is the Time zone and they follow daylight savings time. The Federal Information Processing System (FIPS) Code for echo $county.' County, '.$state_abbrev ?> is 11001.
The population in District Of Columbia County, DC is currently 670,050. That is an increase of 11.48% vs the population of 601,723 in 2010.