Large single crystals of EuMn 2 P 2 were grown from a tin flux whose melt composition and reaction temperature profile were optimized to avoid impurity phases. The crystal structure of EuMn 2 P 2 is of the CaAl 2 Si 2 structure type. The structure was determined by single-crystal X-ray crystallography, with the unit cell in the trigonal lattice, a=4.1294(3) Å and c=6.9936(8) Å, at T=90 K (Z=1, R1=0.0239, wR2=0.0632) and belongs to the P3m1 (#164) space group. Temperature-dependent magnetic susceptibility, resistivity, and neutron diffraction measurements on single crystals indicate that EuMn 2 P 2 is an antiferromagnetic insulator with a Neél temperature of 16.5±0.25 K. The Eu spins order in a simple magnetic structure where the spins in the a–b plane are aligned ferromagnetically; these ferromagnetic planes are stacked antiferromagnetically along the c-axis.