The officers were able to get the child to breathe by striking her on the back as she struggled to breathe.
She then threw up food and water, police said. The girl was taken to the hospital, where she was treated and released.
"These Officers displayed the character and dedication that every Newark Police Division member is committed to in providing outstanding community service," Newark Public Safety Director Anthony Ambrose said in a statement. "I am proud that these Officers stepped in as if this child was a member of their own family. Today, I speak for the entire City of Newark in giving them our most sincere thanks."