2021年(nian)(nian)鎮海區(qu)實現地區(qu)生產(chan)(chan)總值（GDP）1252.4億(yi)元(yuan)，晉(jin)升到全省(sheng)第18位，按可(ke)比價計(ji)算(suan)，比上年(nian)(nian)增(zeng)(zeng)長7.0%，其中，第一產(chan)(chan)業(ye)增(zeng)(zeng)加(jia)值7.0億(yi)元(yuan)，增(zeng)(zeng)長3.1%；第二(er)產(chan)(chan)業(ye)增(zeng)(zeng)加(jia)值839.7億(yi)元(yuan)，增(zeng)(zeng)長7.8%；第三(san)(san)產(chan)(chan)業(ye)增(zeng)(zeng)加(jia)值405.7億(yi)元(yuan)，增(zeng)(zeng)長5.5%。三(san)(san)次產(chan)(chan)業(ye)之比由2020年(nian)(nian)的0.6∶64.4∶35.0調整為2021年(nian)(nian)的0.6∶67.0∶32.4。

2021年(nian)(nian)(nian)(nian)(nian)鎮海區完(wan)(wan)成(cheng)農(nong)林(lin)牧漁業總(zong)產(chan)值(zhi)9.87億(yi)(yi)(yi)元，比(bi)上(shang)年(nian)(nian)(nian)(nian)(nian)增(zeng)(zeng)長(chang)4.4%。全年(nian)(nian)(nian)(nian)(nian)全區完(wan)(wan)成(cheng)規模以(yi)上(shang)工業總(zong)產(chan)值(zhi)3047.4億(yi)(yi)(yi)元，比(bi)上(shang)年(nian)(nian)(nian)(nian)(nian)增(zeng)(zeng)長(chang)33.7%，規模以(yi)上(shang)工業增(zeng)(zeng)加值(zhi)（生產(chan)法）713.5億(yi)(yi)(yi)元，增(zeng)(zeng)長(chang)9.6%。全年(nian)(nian)(nian)(nian)(nian)全區建筑業實現(xian)增(zeng)(zeng)加值(zhi)51.6億(yi)(yi)(yi)元，比(bi)上(shang)年(nian)(nian)(nian)(nian)(nian)下降4.1%。全年(nian)(nian)(nian)(nian)(nian)全區完(wan)(wan)成(cheng)固(gu)定資產(chan)投(tou)資337.9億(yi)(yi)(yi)元，比(bi)上(shang)年(nian)(nian)(nian)(nian)(nian)增(zeng)(zeng)長(chang)22.6%。全年(nian)(nian)(nian)(nian)(nian)全區完(wan)(wan)成(cheng)商品銷(xiao)售(shou)額比(bi)上(shang)年(nian)(nian)(nian)(nian)(nian)增(zeng)(zeng)長(chang)35.1%。全年(nian)(nian)(nian)(nian)(nian)全區實現(xian)外貿自營(ying)進出口總(zong)額621.9億(yi)(yi)(yi)元，比(bi)上(shang)年(nian)(nian)(nian)(nian)(nian)增(zeng)(zeng)長(chang)18.2%。全年(nian)(nian)(nian)(nian)(nian)全區完(wan)(wan)成(cheng)旅游綜合收入45.2億(yi)(yi)(yi)元，比(bi)上(shang)年(nian)(nian)(nian)(nian)(nian)增(zeng)(zeng)長(chang)4.5%。