Bollnäs has a station along the Northern Railline (Norra Stambanan), which it was connected to in 1878.

The railroad was the largest employer in Bollnäs for the greater part of the 20th century, until the 1990s when it was closed due to its location being no longer optimal.

Bollnäs became a city in 1942, nowadays an honorary title without administrative significance.

Rehns BK started as a bandy club, but now it focuses on orienteering and cross-country skiing.

[4] The church's eucharistic chalice, with its paten, is another valuable piece dating from the same period.