[4][5] Members of the board of trustees are elected from seven single-member districts[6] to serve staggered three-year terms.

In 1902, citizens petitioned for a bond and tax election to be held for the purpose of constructing a public school building.

A new high school located on Centre Avenue (site of the current administration building) opened in 1923.

In 1965, Lancaster High School moved to another location – 822 West Pleasant Run Road.

In 1970, Lancaster Middle School was built at 1005 Westridge Avenue to house the district's 6th, 7th, and 8th graders.

Lancaster Intermediate School (currently Belt Line Elementary) opened in 1984 to serve 5th and 6th graders.

Hispanics displaced European-Americans as the district's largest minority group in the 2001–2002 school year.

Lewis said "Johnny has his own room, his own computer, his own DVD player, his own XBox, his own everything, but he brings home C's and F's.

The grade reconfiguration coincided with the opening of a new high school at 200 East Wintergreen Road.

Also, a new and larger Houston Elementary School campus opened to accommodate growth in the northern portion of Lancaster.

[10] Superintendent Larry Lewis said that the district will not face a shortfall if the state didn't approve the 4-day school week proposal; however, Lancaster ISD will have a reserve of only $971,000 to handle unexpected expenses.

Eric Nicholson of the Dallas Observer wrote that because of the "relatively small" sizes of southern Dallas County school districts, the demographic changes were relatively more severe compared to districts in other parts of the county.