The municipality of Leiden had a population of 123,856 in August 2017 .
The city forms one densely connected agglomeration with its suburbs Oegstgeest , Leiderdorp , Voorschoten and Zoeterwoude with 206,647 inhabitants .
The municipality of Leiden had a population of 123,856 in August 2017 , but the city forms one densely connected agglomeration with its suburbs Oegstgeest , Leiderdorp , Voorschoten and Zoeterwoude with 206,647 inhabitants .