2021年昆山市(shi)實現(xian)地(di)區生產總值4748.06億元(yuan)，按可比(bi)(bi)價計算，比(bi)(bi)上(shang)年增(zeng)長(chang)(chang)(chang)7.8%。其中，第一產業(ye)增(zeng)加(jia)(jia)值31.18億元(yuan)，增(zeng)長(chang)(chang)(chang)0.6%；第二產業(ye)增(zeng)加(jia)(jia)值2462.74億元(yuan)，增(zeng)長(chang)(chang)(chang)9.7%；第三產業(ye)增(zeng)加(jia)(jia)值2254.14億元(yuan)，增(zeng)長(chang)(chang)(chang)5.9%，三次(ci)產業(ye)比(bi)(bi)重(zhong)為(wei)0.7:51.8:47.5。年末擁(yong)有市(shi)場主(zhu)體(ti)(ti)(ti)107.77萬(wan)戶(hu)，成為(wei)全省首個市(shi)場主(zhu)體(ti)(ti)(ti)突破100萬(wan)戶(hu)的縣級市(shi)，新登記(ji)市(shi)場主(zhu)體(ti)(ti)(ti)30.56萬(wan)戶(hu)。

2021年(nian)(nian)昆山市完成(cheng)農林牧漁(yu)業(ye)(ye)總(zong)產值(zhi)(zhi)53.19億(yi)(yi)元(yuan)，農林牧漁(yu)業(ye)(ye)增(zeng)(zeng)加值(zhi)(zhi)34.81億(yi)(yi)元(yuan)。糧食總(zong)產量9.10萬(wan)噸，比(bi)(bi)上(shang)(shang)(shang)年(nian)(nian)增(zeng)(zeng)長(chang)0.8%。全(quan)(quan)(quan)(quan)年(nian)(nian)規上(shang)(shang)(shang)工業(ye)(ye)總(zong)產值(zhi)(zhi)首(shou)次(ci)突破萬(wan)億(yi)(yi)元(yuan)，達(da)10284.48億(yi)(yi)元(yuan)，比(bi)(bi)上(shang)(shang)(shang)年(nian)(nian)增(zeng)(zeng)長(chang)12.8%。資(zi)質(zhi)以上(shang)(shang)(shang)建筑業(ye)(ye)企業(ye)(ye)實(shi)現建筑業(ye)(ye)總(zong)產值(zhi)(zhi)379.76億(yi)(yi)元(yuan)，比(bi)(bi)上(shang)(shang)(shang)年(nian)(nian)增(zeng)(zeng)長(chang)19.0%。全(quan)(quan)(quan)(quan)年(nian)(nian)完成(cheng)固定(ding)資(zi)產投資(zi)總(zong)額(e)747.50億(yi)(yi)元(yuan)，比(bi)(bi)上(shang)(shang)(shang)年(nian)(nian)增(zeng)(zeng)長(chang)0.6%。全(quan)(quan)(quan)(quan)年(nian)(nian)實(shi)現社會(hui)消費品零(ling)售(shou)總(zong)額(e)1625.68億(yi)(yi)元(yuan)，比(bi)(bi)上(shang)(shang)(shang)年(nian)(nian)增(zeng)(zeng)長(chang)16.3%。全(quan)(quan)(quan)(quan)年(nian)(nian)完成(cheng)進出口總(zong)額(e)首(shou)次(ci)突破千億(yi)(yi)美(mei)(mei)元(yuan)，達(da)1066.1億(yi)(yi)美(mei)(mei)元(yuan)，比(bi)(bi)上(shang)(shang)(shang)年(nian)(nian)增(zeng)(zeng)長(chang)22.8%，其中出口總(zong)額(e)709.06億(yi)(yi)美(mei)(mei)元(yuan)，增(zeng)(zeng)長(chang)23.6%。全(quan)(quan)(quan)(quan)年(nian)(nian)累計(ji)接待游客1770.40萬(wan)人次(ci)，比(bi)(bi)上(shang)(shang)(shang)年(nian)(nian)增(zeng)(zeng)長(chang)57.1%。實(shi)現旅游收(shou)入259.88億(yi)(yi)元(yuan)，增(zeng)(zeng)長(chang)56.3%。