Deposits at the District's 16 banks totaled $4.3 billion at the end of the first quarter, up more than 8 per cent from the same period in 1976.

According to a Washington Post survey, D.C bank deposits were down slightly from the record $4.33 billion level at the end of last year. But total deposits often fluctuate widely from quarter to quarter, and analysis generally look to long-term figures for trends in the economy.

The 8 per cent year-to-year growth in the past three months compares favorably with a 7 per cent growth rate for calendar 1976 and a 4 per cent rise in the first quarter last year over 1975.

Deposits at the area's largest financial institution, Riggs National Bank, surpassed the $1.5 billion level in the first quarter and totaled $1.54 billion on March 31 compared with $1.36 billion a year earlier. D.C. BANKS(TABLE) (COLUMN)March 15(COLUMN)March 31(COLUMN)April 16 1977(COLUMN)1976(COLUMN)1975 Amer Indian(COLUMN)$17,572,000(COLUMN)$11,558,000(COLUMN)$6,555,316 Amer Security(COLUMN)1,038,221,072(COLUMN)1,018,937,145(COLUMN)933,206,034 Bk of Columbia(COLUMN)32,809,193(COLUMN)23,012,000(COLUMN)15,020,579 D.C. National(COLUMN)51,897,541(COLUMN)42,732,630(COLUMN)44,254,364 Diplomat Nat(COLUMN)7,708,839(COLUMN)3,628,724 Hemisphere Nat(COLUMN)6,134,272(COLUMN)5,195,000(COLUMN)4,328,153 Industrial Bk(COLUMN)44,701,428(COLUMN)35,853,000(COLUMN)37,229,971 Madison Nat(COLUMN)80,722,616(COLUMN)76,410,727(COLUMN)78,409,839 McLachlen Bk(COLUMN)38,936,058(COLUMN)37,062,978(COLUMN)37,969,412 Nat Bk Wash(COLUMN)557,566,748(COLUMN)503,870,848(COLUMN)455,708,152 Nat Capital(COLUMN)32,940,424(COLUMN)33,658,197(COLUMN)32,194,713 Ns&T(COLUMN)333,151,538(COLUMN)318,654,794(COLUMN)307,408,060 Riggs Nat(COLUMN)1,537,398,143(COLUMN)1,357,829,697(COLUMN)1,336,400,747 Security Nat(COLUMN)7,4952,747(COLUMN)73,074,448(COLUMN)76,675,426 Union 1st(COLUMN)422,986,121(COLUMN)407,485,606(COLUMN)417,931,612 United Nat(COLUMN)25,523,688(COLUMN)26,339,954(COLUMN)24,649,448 Total(COLUMN)$4,303,222,428(COLUMN)$3,975,303,748(COLUMN)$3,802,941,817(END TABLE)