Syed Omar was a philanthropist and his charitable acts included donating what is now called Jalan Kubor Cemetery, a large plot of land in Victoria Street for the purposes of a Muslim burial ground, the construction of a mosque in Bencoolen Street and Masjid Kampong Melaka, renamed Masjid Omar Kampong Melaka in his honour. The land where St Andrew's Cathedral stands was also donated by him. He and his family contributed largely to the setting up of the Tan Tock Seng Hospital. Syed Omar's descendants continue to reside in Singapore.
