The senator from New Jersey was speaking at the National Association of Black Journalists Convention in Miami, Florida.
He urged those in attendance to get their stories heard, saying, "at this moment in America more than ever, we need your voices." His comments come on the heels of back-to-back mass shootings in the U.S. On Saturday (August 3), a gunman killed 22 people in El Paso, a Texas city on the border with Mexico.
Law enforcement agencies say the suspected gunman was driven by hatred for Hispanics, citing an online manifesto apparently written by the shooter that was rife with anti-immigrant hatred.
In the second mass shooting 13 hours later, a gunman in Dayton, Ohio, fatally shot nine people, including his sister, before he was killed by police.
The shootings have intensified criticism of what many say is incendiary rhetoric by U.S. President Donald Trump.
Trump has insisted he is not a racist.
Booker told the convention he understood the problem of racism from first-hand experience.
"I'm the only US senator that lives in a low-income black and brown community that isn't the sight of overt recent attacks of white supremacy.
But the city I live in was forged in the fires of bias and bigotry," he said.