Neighbour municipalities are Hyvinkää, Hämeenlinna, Janakkala, Karkkila, Riihimäki, Tammela and Vihti.

The subject of the municipal coat of arms, where the iron symbol has sunk into a wave-cut plate, refers to the lifting of limonite from the lake in the early period.

[7][8] According to local folklore, Kaakkomäki of Loppi was inhabited by a giant devil in ancient times.

The devil tried to destroy the church bell tower and threw it with a large rock.

The stone in the lake brought a disaster: cattle fell ill and animals died.

So the villagers crammed the rock up the cliff and the luck of the cattle was restored.

[17] The forested highland of Tammela, which extends to the western part of Loppi, and the Salpausselkä, which cross the municipality's area, form a watershed between the Kokemäki River watershed to the north and the smaller river basins flowing to the south.

Other (smaller) villages are Hevosoja, Hirvijärvi, Hunsala, Joentaka, Kormu, Metsäkylä, Ourajoki, Pilpala, Räyskälä, Sajaniemi, Salo, Teväntö, Topeno and Vojakkala.

[21][22] Etelä-Hämeen Tanssiopisto is a dance college founded by Maiju Milad, whose main hall is located in the center of Loppi church village.

It is located on the side of lake Punelia and nowadays functions as a restaurant and museum.