根據地(di)區(qu)(qu)生(sheng)產(chan)(chan)總值(zhi)統一核算(suan)(suan)結果，2021年定海區(qu)(qu)實(shi)現(xian)地(di)區(qu)(qu)生(sheng)產(chan)(chan)總值(zhi)(GDP)為605.32億元(yuan)，按可比(bi)價格計算(suan)(suan)，同比(bi)增(zeng)長6.0%。其中，第(di)一產(chan)(chan)業(ye)增(zeng)加(jia)值(zhi)13.84億元(yuan)，同比(bi)增(zeng)長9.6%；第(di)二(er)產(chan)(chan)業(ye)增(zeng)加(jia)值(zhi)216.77億元(yuan)，同比(bi)增(zeng)長10.1%；第(di)三產(chan)(chan)業(ye)增(zeng)加(jia)值(zhi)374.72億元(yuan)，同比(bi)增(zeng)長3.7%。三次產(chan)(chan)業(ye)比(bi)例為2.3:35.8:61.9。按戶(hu)籍(ji)人(ren)口計算(suan)(suan)，人(ren)均地(di)區(qu)(qu)生(sheng)產(chan)(chan)總值(zhi)150739元(yuan)，約(yue)23365美元(yuan)，同比(bi)增(zeng)長5.6%。

2021年(nian)定(ding)海(hai)區(qu)(qu)(qu)(qu)農(nong)林牧漁業(ye)(ye)總(zong)產(chan)值(zhi)(zhi)23.68億(yi)(yi)元(yuan)，同(tong)(tong)(tong)比(bi)增(zeng)(zeng)(zeng)長11.6%。全年(nian)全區(qu)(qu)(qu)(qu)156家(jia)規模以上(shang)工業(ye)(ye)企業(ye)(ye)實(shi)(shi)現產(chan)值(zhi)(zhi)482.23億(yi)(yi)元(yuan)，同(tong)(tong)(tong)比(bi)增(zeng)(zeng)(zeng)長22.5%。年(nian)末區(qu)(qu)(qu)(qu)本級具有資質等級的總(zong)承包和專業(ye)(ye)承包建筑業(ye)(ye)企業(ye)(ye)94家(jia)，實(shi)(shi)現建筑業(ye)(ye)總(zong)產(chan)值(zhi)(zhi)120.21億(yi)(yi)元(yuan)，同(tong)(tong)(tong)比(bi)增(zeng)(zeng)(zeng)長12.7%。全年(nian)全區(qu)(qu)(qu)(qu)全社會消費品(pin)零售(shou)總(zong)額239.27億(yi)(yi)元(yuan)，同(tong)(tong)(tong)比(bi)增(zeng)(zeng)(zeng)長8.1%。全年(nian)全區(qu)(qu)(qu)(qu)完成(cheng)外(wai)貿進(jin)出口總(zong)額1224.27億(yi)(yi)元(yuan)，同(tong)(tong)(tong)比(bi)增(zeng)(zeng)(zeng)長65.5%。全區(qu)(qu)(qu)(qu)實(shi)(shi)現金(jin)融業(ye)(ye)增(zeng)(zeng)(zeng)加值(zhi)(zhi)63.18億(yi)(yi)元(yuan)，同(tong)(tong)(tong)比(bi)增(zeng)(zeng)(zeng)長7.1%。全年(nian)全區(qu)(qu)(qu)(qu)共接待(dai)國(guo)內外(wai)游客176.97萬人次，實(shi)(shi)現旅游總(zong)收入23.19億(yi)(yi)元(yuan)。