Marceljani is a village under the administration of Labin, Croatia.
The village is located about 3 km from the center of the town of Labin and about 8 km from Rabac, Istria in the east. In recent times, since the formation of Croatia, the village was renamed Marceljani (even Marčeljani).
The settlement was formerly part of the Municipality of Sveta Nedelja. The population is 192 (2011). At the census of 2001, Marciljani had 161 inhabitants. In 1991, the village counted 170 inhabitants. From this 33.5% were Croats, 3.5% Serbs, 0.6% Muslims and 62.3% other (at the time they were mostly regionally committed, as Istrians).
Marciljani is home to a few private concerns in the fields of private tourist facilities, carpentry, and a dental laboratory.