Amino acid ionic liquids (AAILs) [C₃(NEt₂)₂(NHR)]X (X = MeSO₄ and NTf₂) based on the triaminocyclopropenium (TAC) cation were synthesized where NHR is derived from an amino acid. Reaction of the alkoxycyclopropenium salt [C₃(NEt₂)₂(OCH₃)]MeSO₄ with an amino acid in the presence of Et₃N gives the corresponding AAILs; the methylsulfate anion was readily exchanged for bistriflamide. Monocations were obtained with L-alanine, L-proline, L-valine, L-threonine, L-serine, L-methionine, L-leucine, L-isoleucine, L-tryptophan, L-tyrosine and L-phenylalanine, whereas dications were obtained with L-lysine (two TAC cations), L-histidine (one TAC and one imidazolium cation) and L-arginine (one TAC and one guanidinium cation). L-Cysteine generated a mixture of the monocationic IL as well as a dication containing one TAC cation and one thiodiaminocyclopropenium cation. L-Asparagine and L-glutamine appear to produce mixtures of amino-linked and amido-linked TAC cations. These materials were obtained as a mixture of the IL and its zwitterion which was initially indicated by the ¹H NMR giving a reduced integral for the methylsulfate anion. The ratios of these IL/zwitterion mixtures were determined by pH titration and microanalysis. The chloride contents, decomposition temperatures, DSC data, viscosity, specific rotations, and pK_a values were determined and solubility studies were also carried out.