ˌɛsˈɑːɹ tˈuːhˈʌndɹɪd twˈɛnti fˈaɪv pɹˈiːviəsli ɛɡzˈɪstᵻd æz pˈoːɹʃənz ʌv sˈɛvɹəl pɹˈiː nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɪks ɹˈaʊts, ɪŋklˈuːdɪŋ stˈeɪt ɹˈaʊt ɪlˈɛvən, stˈeɪt ɹˈaʊt fˈoːɹɾi θɹˈiː ænd stˈeɪt ɹˈaʊt fˈɪfti wˈʌn.
SR 225 previously existed as portions of several pre-1976 routes, including State Route 11, State Route 43 and State Route 51.