根據地區生(sheng)產總(zong)值(zhi)統一(yi)核算(suan)結果，2021年定海區實現地區生(sheng)產總(zong)值(zhi)(GDP)為605.32億(yi)元(yuan)，按可比(bi)價格計算(suan)，同(tong)比(bi)增(zeng)(zeng)(zeng)長(chang)6.0%。其中，第一(yi)產業增(zeng)(zeng)(zeng)加值(zhi)13.84億(yi)元(yuan)，同(tong)比(bi)增(zeng)(zeng)(zeng)長(chang)9.6%；第二產業增(zeng)(zeng)(zeng)加值(zhi)216.77億(yi)元(yuan)，同(tong)比(bi)增(zeng)(zeng)(zeng)長(chang)10.1%；第三產業增(zeng)(zeng)(zeng)加值(zhi)374.72億(yi)元(yuan)，同(tong)比(bi)增(zeng)(zeng)(zeng)長(chang)3.7%。三次產業比(bi)例為2.3:35.8:61.9。按戶(hu)籍人口計算(suan)，人均地區生(sheng)產總(zong)值(zhi)150739元(yuan)，約23365美元(yuan)，同(tong)比(bi)增(zeng)(zeng)(zeng)長(chang)5.6%。

2021年(nian)定海區(qu)(qu)農林(lin)牧漁(yu)業(ye)(ye)(ye)總(zong)產(chan)值(zhi)23.68億(yi)元(yuan)(yuan)，同比增(zeng)長(chang)11.6%。全(quan)(quan)年(nian)全(quan)(quan)區(qu)(qu)156家規模以上工業(ye)(ye)(ye)企(qi)業(ye)(ye)(ye)實現(xian)產(chan)值(zhi)482.23億(yi)元(yuan)(yuan)，同比增(zeng)長(chang)22.5%。年(nian)末(mo)區(qu)(qu)本級(ji)(ji)具有資(zi)質(zhi)等級(ji)(ji)的(de)總(zong)承包和專業(ye)(ye)(ye)承包建(jian)筑(zhu)業(ye)(ye)(ye)企(qi)業(ye)(ye)(ye)94家，實現(xian)建(jian)筑(zhu)業(ye)(ye)(ye)總(zong)產(chan)值(zhi)120.21億(yi)元(yuan)(yuan)，同比增(zeng)長(chang)12.7%。全(quan)(quan)年(nian)全(quan)(quan)區(qu)(qu)全(quan)(quan)社會消(xiao)費品零售總(zong)額239.27億(yi)元(yuan)(yuan)，同比增(zeng)長(chang)8.1%。全(quan)(quan)年(nian)全(quan)(quan)區(qu)(qu)完(wan)成(cheng)外(wai)貿進出口總(zong)額1224.27億(yi)元(yuan)(yuan)，同比增(zeng)長(chang)65.5%。全(quan)(quan)區(qu)(qu)實現(xian)金融業(ye)(ye)(ye)增(zeng)加值(zhi)63.18億(yi)元(yuan)(yuan)，同比增(zeng)長(chang)7.1%。全(quan)(quan)年(nian)全(quan)(quan)區(qu)(qu)共(gong)接待國內外(wai)游客(ke)176.97萬人次(ci)，實現(xian)旅游總(zong)收入(ru)23.19億(yi)元(yuan)(yuan)。