| Lazare Richtenberger | |
| Birth Date: | 1792 |
| Birth Place: | Aschaffenburg, Electorate of Mainz |
| Death Place: | Brussels, Belgium |
| Occupation: | Banker |
| Years Active: | 1830s–1853 |
Lazare Richtenberger (1792 – 3 December 1853) was Holy Roman Empire-born banker of Jewish descent. He was closely connected to the court of Leopold I of Belgium and later was awarded the Order of Leopold.
Richtenberger served as James Mayer de Rothschild's agent in Brussels from 1832 on,[1] in the early years after the foundation of the Kingdom of Belgium. He was joined by Samuel Lambert, who later became his son-in-law. As of 1843, the name of the firm was “Lambert–Richtenberger, agent Rothschild”.[2] After Richtenberger's death in 1853, Lambert took over the firm and combined it with his father's company, also an agency of Rothschild, in Antwerp to form the Banque Lambert.[3]