Lorenzo Bereciartúa y Balerdi (February 28, 1895 - October 23, 1968) was a Spanish bishop.
Balerdi was born in Bidegoyan, Guipúzcoa. He was consecrated Auxiliary Bishop of Zaragoza on August 11, 1946. Appointed Bishop of Sigüenza-Guadalajara in July 1955. He was appointed Bishop of San Sebastián on August 30, 1963. He died in Pamplona, aged 73.