By THE ASSOCIATED PRESS

A profile of the District of Columbia, which holds its presidential primary Tuesday:

NUMBERS

Population: 617,996

AGE

Median age: 33.8

Percentage of population 65 and over: 11.4 percent

RACE

50 percent black, 34.8 percent white, 3.5 percent Asian, 9.1 percent Hispanic

LANGUAGE

Language other than English spoken at home: 14.6 percent

EDUCATION

High school graduate: 86.5 percent

Bachelor's degree or higher: 49.2 percent

MONEY

Median household income: $58,526

People below poverty level: 18.5 percent

Homeownership rate: 43.5 percent

2008 PRESIDENTIAL RESULTS

Barack Obama, 92.5 percent

John McCain, 6.5 percent

REGISTERED VOTERS

Democratic, 74.9 percent

Republican, 6.6 percent

Undeclared or other party, 18.6 percent

DISTRICT OF COLUMBIA FACTS

_ District residents were granted the right to vote in presidential elections in 1961, when the 23rd Amendment to the Constitution was ratified. The district is restricted to the number of electors of the least populous state, regardless of its own population. The Democratic candidate has carried the district in every presidential election since residents were given the right to vote.

_ The district's population grew by 2.7 percent between 2010 and 2011, the fastest rate of growth in the nation and the first time since the late 1940s that the district has led states in growth. The district is also on the verge of losing its black majority for the first time in more than 60 years.