2021年昆山市(shi)實現地區生產(chan)(chan)總值(zhi)4748.06億(yi)元，按可比價計算，比上年增長7.8%。其(qi)中，第(di)一(yi)產(chan)(chan)業(ye)增加(jia)值(zhi)31.18億(yi)元，增長0.6%；第(di)二產(chan)(chan)業(ye)增加(jia)值(zhi)2462.74億(yi)元，增長9.7%；第(di)三產(chan)(chan)業(ye)增加(jia)值(zhi)2254.14億(yi)元，增長5.9%，三次產(chan)(chan)業(ye)比重為0.7:51.8:47.5。年末擁有市(shi)場(chang)(chang)主體(ti)107.77萬戶(hu)，成(cheng)為全(quan)省首個(ge)市(shi)場(chang)(chang)主體(ti)突破100萬戶(hu)的縣級市(shi)，新登記市(shi)場(chang)(chang)主體(ti)30.56萬戶(hu)。

2021年(nian)(nian)昆山市完成(cheng)農林(lin)牧漁(yu)業總(zong)(zong)(zong)產值(zhi)53.19億(yi)(yi)(yi)元(yuan)(yuan)(yuan)，農林(lin)牧漁(yu)業增(zeng)(zeng)加值(zhi)34.81億(yi)(yi)(yi)元(yuan)(yuan)(yuan)。糧食總(zong)(zong)(zong)產量9.10萬噸，比(bi)上(shang)年(nian)(nian)增(zeng)(zeng)長(chang)(chang)(chang)0.8%。全(quan)年(nian)(nian)規上(shang)工業總(zong)(zong)(zong)產值(zhi)首次突(tu)破萬億(yi)(yi)(yi)元(yuan)(yuan)(yuan)，達10284.48億(yi)(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上(shang)年(nian)(nian)增(zeng)(zeng)長(chang)(chang)(chang)12.8%。資質以上(shang)建(jian)筑業企業實現建(jian)筑業總(zong)(zong)(zong)產值(zhi)379.76億(yi)(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上(shang)年(nian)(nian)增(zeng)(zeng)長(chang)(chang)(chang)19.0%。全(quan)年(nian)(nian)完成(cheng)固定資產投資總(zong)(zong)(zong)額747.50億(yi)(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上(shang)年(nian)(nian)增(zeng)(zeng)長(chang)(chang)(chang)0.6%。全(quan)年(nian)(nian)實現社(she)會消費(fei)品零售總(zong)(zong)(zong)額1625.68億(yi)(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上(shang)年(nian)(nian)增(zeng)(zeng)長(chang)(chang)(chang)16.3%。全(quan)年(nian)(nian)完成(cheng)進出口(kou)總(zong)(zong)(zong)額首次突(tu)破千億(yi)(yi)(yi)美元(yuan)(yuan)(yuan)，達1066.1億(yi)(yi)(yi)美元(yuan)(yuan)(yuan)，比(bi)上(shang)年(nian)(nian)增(zeng)(zeng)長(chang)(chang)(chang)22.8%，其中出口(kou)總(zong)(zong)(zong)額709.06億(yi)(yi)(yi)美元(yuan)(yuan)(yuan)，增(zeng)(zeng)長(chang)(chang)(chang)23.6%。全(quan)年(nian)(nian)累計接(jie)待游(you)客(ke)1770.40萬人次，比(bi)上(shang)年(nian)(nian)增(zeng)(zeng)長(chang)(chang)(chang)57.1%。實現旅游(you)收入259.88億(yi)(yi)(yi)元(yuan)(yuan)(yuan)，增(zeng)(zeng)長(chang)(chang)(chang)56.3%。