2021年(nian)鎮海區實現(xian)地區生產總值（GDP）1252.4億(yi)元(yuan)，晉升到全省第(di)18位，按可(ke)比(bi)(bi)(bi)價計(ji)算，比(bi)(bi)(bi)上年(nian)增(zeng)(zeng)長(chang)7.0%，其中(zhong)，第(di)一(yi)產業增(zeng)(zeng)加(jia)(jia)值7.0億(yi)元(yuan)，增(zeng)(zeng)長(chang)3.1%；第(di)二(er)產業增(zeng)(zeng)加(jia)(jia)值839.7億(yi)元(yuan)，增(zeng)(zeng)長(chang)7.8%；第(di)三(san)產業增(zeng)(zeng)加(jia)(jia)值405.7億(yi)元(yuan)，增(zeng)(zeng)長(chang)5.5%。三(san)次產業之比(bi)(bi)(bi)由2020年(nian)的0.6∶64.4∶35.0調整(zheng)為(wei)2021年(nian)的0.6∶67.0∶32.4。

2021年(nian)(nian)(nian)鎮海(hai)區(qu)完成農林牧漁業(ye)總產(chan)(chan)值(zhi)(zhi)9.87億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上年(nian)(nian)(nian)增(zeng)(zeng)長(chang)4.4%。全(quan)(quan)(quan)年(nian)(nian)(nian)全(quan)(quan)(quan)區(qu)完成規模以上工業(ye)總產(chan)(chan)值(zhi)(zhi)3047.4億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上年(nian)(nian)(nian)增(zeng)(zeng)長(chang)33.7%，規模以上工業(ye)增(zeng)(zeng)加(jia)值(zhi)(zhi)（生產(chan)(chan)法）713.5億(yi)(yi)元(yuan)(yuan)(yuan)，增(zeng)(zeng)長(chang)9.6%。全(quan)(quan)(quan)年(nian)(nian)(nian)全(quan)(quan)(quan)區(qu)建筑業(ye)實現(xian)增(zeng)(zeng)加(jia)值(zhi)(zhi)51.6億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上年(nian)(nian)(nian)下降4.1%。全(quan)(quan)(quan)年(nian)(nian)(nian)全(quan)(quan)(quan)區(qu)完成固定資(zi)產(chan)(chan)投資(zi)337.9億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上年(nian)(nian)(nian)增(zeng)(zeng)長(chang)22.6%。全(quan)(quan)(quan)年(nian)(nian)(nian)全(quan)(quan)(quan)區(qu)完成商品(pin)銷售(shou)額(e)比(bi)上年(nian)(nian)(nian)增(zeng)(zeng)長(chang)35.1%。全(quan)(quan)(quan)年(nian)(nian)(nian)全(quan)(quan)(quan)區(qu)實現(xian)外貿自營進出口總額(e)621.9億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上年(nian)(nian)(nian)增(zeng)(zeng)長(chang)18.2%。全(quan)(quan)(quan)年(nian)(nian)(nian)全(quan)(quan)(quan)區(qu)完成旅(lv)游綜合(he)收入45.2億(yi)(yi)元(yuan)(yuan)(yuan)，比(bi)上年(nian)(nian)(nian)增(zeng)(zeng)長(chang)4.5%。