This data was used to create my Top Marginal Tax Rates: 1916-2011 data graphic. It includes rates for personal income, corporate, long-term capital gains and dividends.
Historical Income and Capital Gains Tax Rates
Historical Income Top Tax Rate
Historical Individual Income Tax Parameters
Top Marginal Tax Rates: 1916-2011 (Poster)
The Tax Foundation - Federal Individual Income Tax: Exemptions and Treatment of Dividends, 1913-2006
Historical Top Bracket and Rate