Lech Stefan Kuropatwinski (born 4 July 1947 in Grodno, Wloclawek County) is a Polish politician.
He was elected to Sejm on 25 September 2005 getting 6115 votes in 5 Torun district, candidating from Samoobrona Rzeczpospolitej Polskiej list.
He was also a member of Sejm 2001-2005.