2021年(nian)(nian)昆山市(shi)實現(xian)地區(qu)生產總值4748.06億元(yuan)，按可比價計算(suan)，比上年(nian)(nian)增(zeng)(zeng)(zeng)長(chang)7.8%。其(qi)中，第一產業(ye)增(zeng)(zeng)(zeng)加(jia)(jia)(jia)值31.18億元(yuan)，增(zeng)(zeng)(zeng)長(chang)0.6%；第二產業(ye)增(zeng)(zeng)(zeng)加(jia)(jia)(jia)值2462.74億元(yuan)，增(zeng)(zeng)(zeng)長(chang)9.7%；第三產業(ye)增(zeng)(zeng)(zeng)加(jia)(jia)(jia)值2254.14億元(yuan)，增(zeng)(zeng)(zeng)長(chang)5.9%，三次產業(ye)比重為0.7:51.8:47.5。年(nian)(nian)末擁(yong)有市(shi)場主(zhu)體107.77萬戶(hu)，成為全省首個市(shi)場主(zhu)體突破100萬戶(hu)的縣(xian)級(ji)市(shi)，新登記(ji)市(shi)場主(zhu)體30.56萬戶(hu)。

2021年(nian)昆山市完成(cheng)農(nong)(nong)林牧(mu)漁業(ye)總(zong)產(chan)(chan)(chan)值53.19億(yi)(yi)元(yuan)(yuan)(yuan)，農(nong)(nong)林牧(mu)漁業(ye)增(zeng)(zeng)加值34.81億(yi)(yi)元(yuan)(yuan)(yuan)。糧食總(zong)產(chan)(chan)(chan)量(liang)9.10萬(wan)噸，比(bi)(bi)(bi)上(shang)年(nian)增(zeng)(zeng)長(chang)(chang)0.8%。全年(nian)規上(shang)工(gong)業(ye)總(zong)產(chan)(chan)(chan)值首次(ci)突破萬(wan)億(yi)(yi)元(yuan)(yuan)(yuan)，達(da)10284.48億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)(bi)(bi)上(shang)年(nian)增(zeng)(zeng)長(chang)(chang)12.8%。資(zi)質以上(shang)建(jian)筑業(ye)企(qi)業(ye)實現建(jian)筑業(ye)總(zong)產(chan)(chan)(chan)值379.76億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)(bi)(bi)上(shang)年(nian)增(zeng)(zeng)長(chang)(chang)19.0%。全年(nian)完成(cheng)固定資(zi)產(chan)(chan)(chan)投資(zi)總(zong)額747.50億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)(bi)(bi)上(shang)年(nian)增(zeng)(zeng)長(chang)(chang)0.6%。全年(nian)實現社(she)會消費品零售總(zong)額1625.68億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)(bi)(bi)上(shang)年(nian)增(zeng)(zeng)長(chang)(chang)16.3%。全年(nian)完成(cheng)進出口(kou)總(zong)額首次(ci)突破千億(yi)(yi)美(mei)元(yuan)(yuan)(yuan)，達(da)1066.1億(yi)(yi)美(mei)元(yuan)(yuan)(yuan)，比(bi)(bi)(bi)上(shang)年(nian)增(zeng)(zeng)長(chang)(chang)22.8%，其中出口(kou)總(zong)額709.06億(yi)(yi)美(mei)元(yuan)(yuan)(yuan)，增(zeng)(zeng)長(chang)(chang)23.6%。全年(nian)累計(ji)接待游(you)客1770.40萬(wan)人次(ci)，比(bi)(bi)(bi)上(shang)年(nian)增(zeng)(zeng)長(chang)(chang)57.1%。實現旅游(you)收(shou)入259.88億(yi)(yi)元(yuan)(yuan)(yuan)，增(zeng)(zeng)長(chang)(chang)56.3%。