The District of Columbia's population is now 681,170.
The figure was released Tuesday by the city. In a statement, city officials said the figure is one not seen since the 1970s.
The city said between July 1, 2015, and July 1, 2016, the city added 10,793 new residents, an increase of about 900 new residents per month.
The city said its population has grown over 13 percent since April 2010 when the decennial census count took place.
Mayor Muriel Bowser said the population growth showed that the nation's capital "continues to be an attractive place to live, work and start a family."
According to the U.S. Census Bureau, the largest contributor to population growth in Washington in this period was domestic and international migration— people moving to Washington from other parts of the United States and from abroad.
Between July 2015 and 2016, in addition to the natural increase (births minus deaths) of 4,324, a total of 6,392 net new residents moved into Washington, or 59 percent of the total growth this period. Of these 6,392 net new residents to the city, 4,116 moved to Washington from other countries and 2,276 from other U.S. states.
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Since 2014, Washington has attracted more than 4,000 new international residents each year.
