X0101 24F-2NT LIVE 0000889512 XXXXXXXX false false N-1A LEGG MASON PARTNERS INSTITUTIONAL TRUST 620 Eighth Avenue 47th Floor New York NY X1 10018 Western Asset Institutional Government Reserves S000016858 true Western Asset Institutional Liquid Reserves S000008908 true Western Asset Institutional U.S. Treasury Obligations Money Market Fund S000041891 true Western Asset Institutional U.S. Treasury Reserves S000008910 true Western Asset Premier Institutional Government Reserves S000066839 true Western Asset Premier Institutional Liquid Reserves S000066840 true Western Asset Premier Institutional US Treasury Reserves S000066841 true Western Asset Select Tax Free Reserves S000008909 true 811-6740 033-49552 08/31/2024 false 252942482425.00 246631870940.00 25013324395.00 271645195335.00 0.00 (18702712910.00) 0.0001531 0.00 0.00 0.00 0.00 0.00 /s/ Christopher Berarducci Christopher Berarducci, Treasurer and Principal Financial Officer 11/12/2024