Upper Darby School District (UDSD) is a large public school district of approximately 12,000 students in Upper Darby Township, Delaware County, Pennsylvania.

[3] Upper Darby schools serve an increasingly diverse population: 41% of students are White, 42% are African American, 13% are Asian/Pacific Islander, 3% are Hispanic and 1% are other.

In 2010, there are 877 Limited English Proficient (LEP) students speaking over 70 languages, including Punjabi, Vietnamese, Chinese, Korean, Albanian, Greek, and Urdu.

In addition, the district annually educates more than 380 students who have refugee status and/or limited formal schooling.

In the past seven years, the percentage of students who meet the low-income status set by the Federal Free/Reduced Lunch Program has risen from 23% to almost 50%.