EXHIBIT 99.1 PRESS RELEASE DATED OCTOBER 23, 2024 Company Contact: William R. Jacobs Chief Financial Officer Tel: (732) 499-7200 ext. 2519 FOR IMMEDIATE RELEASE NORTHFIELD BANCORP, INC. ANNOUNCES THIRD QUARTER 2024 RESULTS NOTABLE ITEMS FOR THE QUARTER INCLUDE: • DILUTED EARNINGS PER SHARE WERE $0.16 FOR THE CURRENT QUARTER COMPARED TO $0.14 FOR THE TRAILING QUARTER, AND $0.19 FOR THE THIRD QUARTER OF 2023. • NET INTEREST MARGIN REMAINED RELATIVELY STABLE AT 2.08% FOR THE CURRENT QUARTER AS COMPARED TO 2.09 ...