經(jing)初(chu)步核算(suan)，2021年海門區實現地區生產(chan)總值(zhi)1569.33億(yi)元(yuan)，比上年增長9.4%。其中，第(di)一產(chan)業(ye)(ye)增加值(zhi)72.64億(yi)元(yuan)，增長4.5%；第(di)二產(chan)業(ye)(ye)增加值(zhi)769.69億(yi)元(yuan)，增長8.6%；第(di)三產(chan)業(ye)(ye)增加值(zhi)727.00億(yi)元(yuan)，增長10.7%。三次產(chan)業(ye)(ye)結構調整為4.6：49.1：46.3。全(quan)區人均地區生產(chan)總值(zhi)158119元(yuan)，增長9.3%。

2021年(nian)海門區糧食總(zong)(zong)產(chan)(chan)量25.18萬(wan)噸，比上(shang)(shang)年(nian)增(zeng)(zeng)(zeng)加0.01萬(wan)噸。全(quan)(quan)區規模以(yi)上(shang)(shang)工業(ye)增(zeng)(zeng)(zeng)加值同(tong)比增(zeng)(zeng)(zeng)長12.9%。年(nian)末全(quan)(quan)區擁有資質以(yi)上(shang)(shang)建筑(zhu)業(ye)企業(ye)529家。建筑(zhu)企業(ye)全(quan)(quan)年(nian)完成建筑(zhu)業(ye)總(zong)(zong)產(chan)(chan)值2233億(yi)元(yuan)(yuan)，增(zeng)(zeng)(zeng)長2.1%。全(quan)(quan)年(nian)固定資產(chan)(chan)投資比上(shang)(shang)年(nian)增(zeng)(zeng)(zeng)長2.1%。全(quan)(quan)年(nian)房地(di)產(chan)(chan)開發投資129.00億(yi)元(yuan)(yuan)。全(quan)(quan)年(nian)實現社會消費品零售(shou)總(zong)(zong)額506.43億(yi)元(yuan)(yuan)，增(zeng)(zeng)(zeng)長16.9%。全(quan)(quan)年(nian)進出口總(zong)(zong)額322.47億(yi)元(yuan)(yuan)，同(tong)比增(zeng)(zeng)(zeng)長27.3 %。全(quan)(quan)年(nian)接(jie)待游(you)客320.6萬(wan)人次(ci)，其中，國際旅游(you)者人數2660人次(ci)。旅游(you)總(zong)(zong)收入(ru)達29.80億(yi)元(yuan)(yuan)，其中，旅游(you)外匯(hui)收入(ru)達208萬(wan)美(mei)元(yuan)(yuan)。全(quan)(quan)年(nian)實現一般公共(gong)預(yu)算(suan)收入(ru)79.01億(yi)元(yuan)(yuan)，增(zeng)(zeng)(zeng)長7.5%。全(quan)(quan)年(nian)一般公共(gong)預(yu)算(suan)支出134.32億(yi)元(yuan)(yuan)，比上(shang)(shang)年(nian)增(zeng)(zeng)(zeng)長0.7%。