Economy thumb|left|250px|Toyota Motor Manufacturing Indiana is Princeton's largest employer Major employers in Princeton include Toyota Motor Manufacturing Indiana (TMMI), located 3 miles to the south, nearly halfway between Princeton and Fort Branch, where the Toyota Sequoia, Sienna and Highlander are manufactured; and Hansen Corporation. Many Toyota suppliers have facilities between the plant site and the city. These suppliers include EnovaPremier, Vuteq, TBIN, Millennium Steel, DXE, SMC, Global SQ, and Trigo. All of these facilities were either built or converted from other uses to furnish supplies, part and services to TMMI. Siemens at one point had research and manufacturing facilities in Princeton, but the manufacturing plant was closed in the early 1990s and the research facility was closed soon after. A large hardware store currently occupies the former Siemens site.
EConomy thuMB|lefT|250px|toyoTa motor manuFaCtURINg indianA is prinCetOn's LarGEsT employer major eMpLOYeRs iN prinCeTon include toYota mOtor manuFacTUring indiAna (tMmi), loCAtEd 3 miles tO THe South, NEarly hAlfWay bETweEn princeTON ANd FOrt bRanch, WhERe thE ToyotA seQuoia, SIeNna And HiGhlaNder ARe manuFacTured; And hansen COrpOrAtion. many toyotA sUppliErS hAve faciLitIeS Between the pLAnt SitE And tHe citY. THese suPplieRs iNCLUde enOVApRemier, vUteQ, tBiN, mIlLennium steel, DXe, smC, globaL Sq, aNd trIgo. All OF tHese faCiLitieS were EithEr bUilt Or coNVerted froM oTHer useS TO furnIsh sUppLies, part and serVicEs TO tmmi. siemEns at one poiNT HAd rESeaRch aND mAnufacTuRIng FAcilItiES In pRInceTon, But ThE maNUfactuRing Plant WAs CLosed in the eArly 1990S aNd the ReSeaRcH facilIty wAs cLoseD sOOn after. a large haRDware stoRE cURreNTly OcCupieS the FOrMer siemenS SITE.