BlackRock California Municipal Income Trust operates as a nondiversified, closed-end management investment company. It invests primarily in municipal bonds. The trust's investment portfolio comprises investments in transportation, hospital, housing, education, power, industrial and pollution control, and tobacco sectors. BlackRock Advisors, Inc. serves as the investment advisor of the trust. BlackRock California Municipal Income Trust was founded in 2001 and is based in Wilmington, Delaware.