<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000887126
<NAME> MUNIYIELD CALIFORNIA INSURED FUND, INC.
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-START> NOV-01-1999
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 310097936
<INVESTMENTS-AT-VALUE> 303300444
<RECEIVABLES> 9545072
<ASSETS-OTHER> 233256
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 313078772
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 539765
<TOTAL-LIABILITIES> 539765
<SENIOR-EQUITY> 100000000
<PAID-IN-CAPITAL-COMMON> 232669056
<SHARES-COMMON-STOCK> 16549484
<SHARES-COMMON-PRIOR> 16549484
<ACCUMULATED-NII-CURRENT> 1659336
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (8659887)
<OVERDISTRIBUTION-GAINS> (6332006)
<ACCUM-APPREC-OR-DEPREC> (6797492)
<NET-ASSETS> 312539007
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 8897654
<OTHER-INCOME> 0
<EXPENSES-NET> (1093817)
<NET-INVESTMENT-INCOME> 7803837
<REALIZED-GAINS-CURRENT> (8659887)
<APPREC-INCREASE-CURRENT> 10978687
<NET-CHANGE-FROM-OPS> 10122637
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (6540356)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 1806681
<ACCUMULATED-NII-PRIOR> 2171455
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (6332006)
<GROSS-ADVISORY-FEES> 775858
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1093817
<AVERAGE-NET-ASSETS> 311858838
<PER-SHARE-NAV-BEGIN> 12.73
<PER-SHARE-NII> .48
<PER-SHARE-GAIN-APPREC> .14
<PER-SHARE-DIVIDEND> (.40)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.84
<EXPENSE-RATIO> .70
</TABLE>
