If you are coming from the Airport,you can go with a Bus from the airport to the Bus station and then you can go with Tram nr 6 (direction Črnomerec),exit Tram stop Zrinjevac.
The city railway station is only one Tram stop or 5-6 minutes on foot far-away.
You can go also with a Tram Nr 6 (direction Črnomerec), exit Tram stop Zrinjevac