The provincial seal shows Vishnu in front of the Khmer temple Phra Prang Sam Yod.[2]
The escutcheon of Lopburi shows Phra Narai and in the background Phra Prang Sam Yod, the "Sanctuary with the Three Towers". It refers to King Narai who in 1664 fortified the city to be used as an alternative capital when Ayutthaya was threatened by a Dutch naval blockade.[3]
The provincial tree as well as the provincial flower is the bullet wood.[4]
The slogan of the province is National treasures of King Narai's palace and Phra Kan Shrine, famous Prang Sam Yot, city of Din So Phong Marl, well-known Pa Sak Cholasit Dam and golden land of King Narai the Great.