<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
The schedule contains summary financial information extracted from
Dean Witter Principal Plus Fund L.P. and is qualified in its entirety
by reference to such financial statements.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<CASH> 4,252,927
<SECURITIES> 37,857,317
<RECEIVABLES> 20,115
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 0
<PP&E> 0
<DEPRECIATION> 0
<TOTAL-ASSETS> 41,894,358<F1>
<CURRENT-LIABILITIES> 0
<BONDS> 0
0
0
<COMMON> 0
<OTHER-SE> 0
<TOTAL-LIABILITY-AND-EQUITY> 41,894,358<F2>
<SALES> 0
<TOTAL-REVENUES> 1,237,393<F3>
<CGS> 0
<TOTAL-COSTS> 0
<OTHER-EXPENSES> 1,181,482
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> 118,194<F4>
<INCOME-TAX> 0
<INCOME-CONTINUING> 118,194<F4>
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 118,194<F4>
<EPS-BASIC> 0
<EPS-DILUTED> 0
<FN>
<F1>In addition to cash, securities and receivables, total assets include
net unrealized gain on open contracts of $491,262, net option premiums of
$(213,500) and unrealized loss on Zero-Coupon U.S. Treasury Securities of
$513,763.
<F2>Liabilities include redemptions payable of $1,145,822, accrued
brokerage fees of $140,830, accrued administrative expenses of
$159,109, and accrued management fees of $35,207.
<F3>Total revenue includes realized trading revenue of $(592,674), net
change in unrealized of $110,526, interest income of $796,790 and
change in valuation of Yield Pool of $922,751.
<F4>Income-Pretax, Income Continuing and Net Income includes minority
interest in income of $(62,283).
</FN>
</TABLE>
