The crystal and molecular structure of crystalline triethanolammonium nitrate (TEAN) was determined. TEAN is monoclinic with space group P2(1)/c and has lattice parameters a = 6.592(1), b = 16.358(1), c = 9.3850(8) angstrom and beta = 90.87(1)-degrees. Based on four formula weights of TEAN per unit cell, the computed density is 1.393 g/cm 3. The structure is a three-dimensional hydrogen bonded network of cations and anions. An interesting feature of the cation conformation is the presence of intramolecular trifurcated hydrogen bonding of the proton.