A U.S. District Court judge in Baltimore yesterday sentenced a Prince George's County elementary school principal to a month's imprisonment and a fine of $10,000 for evading his income taxes in 1975, Internal Revenue Service officials reported.

Frank James Parise, 50, who since September has been principal at the Yorktown Elementary School in Bowie, will also have to pay some $90,000 in back taxes, interest and penalties under terms of the sentence imposed by Judge Alexander Harvey II. Parise pleaded guilty to the charge last November, according to Domenic LaPonzina of the IRS.

From 1972 until this spring, Parise served as principal of the Margaret Brent Elementary school in New Carrollton. That school closed its doors at the end of the 1979-80 school year.

IRS officials said yesterday that the income tax evasion charges had nothing to do with Parise's school salary but resulted from income he received in connection with his work as a corporate officer of Cameo Bronze Inc., a Temple Hills metal refinishing company.

A Prince George's County school official said yesterday that the school system has not been officially informed either of Parise's guilty plea or of his sentencing. "We have not been notified . . . This is news to us," said the school system's Brian Porter.