The post office was originally called Normanskill and was built in 1852 with William H. Slingerland as the first post master. In 1863, the Albany and Susquehanna Railroad was built through Slingerlands with a station established here as well. William H. Slingerland was the surveyor of the road, and since his route came in $600,000 less than a previous survey the company named the station here Slingerlands in his honor.
The post office was formerly known as Normanskill and constructed in 1852 under William H. Slingerland's leadership as the first postmaster. In 1863, the Albany and Susquehanna Railroad was established through Slingerlands with a station built here too. William H. Slingerland served as the road surveyor, and since his route cost $600,000 less than another survey, the company named the station Slingerlands in his honor.