Horii (written: 堀井) is a Japanese surname. Notable people with the surname include:
Christine Horii (born 1978), American singer better known as Rachel Factor , Japanese footballer , politician , Japanese sprinter , Japanese speed skater and politician Ryousuke Horii (堀井 亮佑, born 1982), Japanese video game designer and lyricist for Yakuza/Like A Dragon franchise , Japanese swimmer , Japanese gravure idol , Japanese general , Japanese football player and manager , Japanese video game designer