Alexandria was born in the Bronx to working-class parents. Her father was a small business owner from the South Bronx. Her mother was born in Puerto Rico—growing up around a large family near Arecibo. Her mother cleaned homes, and everyone pitched in on the family business.
From an early age, Alexandria grew up with a deep understanding of income inequality. The state of Bronx public schools in the late 80s and early 90s sent her parents on a search for a solution. She ended up attending public school in Yorktown—40 minutes north of her birthplace. As a result, much of her early life was spent in transit between her tight-knit extended family in the Bronx and her daily student life. It was clear to her, even then, that the zip code a child was born in determined much of their destiny.