The Kansas City Chiefs have blocked the most punts by a team in a season, with 6 punts blocked in 1990.

nfl most blocked punts by a team in a season
Interpreted as:
NFL most defensive blocked punts by a team in a season
1990Chiefs1988Oilers1983Vikings1978Falcons1975Lions2019Patriots2014Eagles1987Rams1987Bills1987Saints1986Seahawks1984Seahawks1977Falcons1976Broncos1976Cowboys1974Lions1973Redskins1970Vikings1950Rams2021Cowboys2020Lions2017Rams6555544444444444444333
TEAMSEASONGPPUNT BLKTKLASTCOMBSCKSCKYINTINT YDSINT TDFFFRFR TD
Kansas City ChiefsKansas City Chiefs199016660.0421202501251
Houston OilersHouston Oilers198816542.0353223022200
Minnesota VikingsMinnesota Vikings198316547.0326251680231
Atlanta FalconsAtlanta Falcons197816547.0425121590250
Detroit LionsDetroit Lions197514538.0306203151171
New England PatriotsNew England Patriots201916466227493647.032825353315112
Philadelphia EaglesPhiladelphia Eagles20141648202061,02649.035712145224162
Los Angeles RamsLos Angeles Rams198715438.0304163052111
Buffalo BillsBuffalo Bills198715434.026717930143
New Orleans SaintsNew Orleans Saints198715447.0355302800180
Seattle SeahawksSeattle Seahawks198616447.0306222161140
Seattle SeahawksSeattle Seahawks198416455.0398386977251
Atlanta FalconsAtlanta Falcons197714442.0391264622221
Denver BroncosDenver Broncos197614432.0240244524132
Dallas CowboysDallas Cowboys197614444.0327161330121
Detroit LionsDetroit Lions197414424.0187172662130
Washington RedskinsWashington Redskins197314453.0355265984182
Minnesota VikingsMinnesota Vikings197014449.0360284122163
Los Angeles RamsLos Angeles Rams195012437.0297315121151
Dallas CowboysDallas Cowboys20211736873331,02041.02972640551381
Detroit LionsDetroit Lions20201637233531,07624.019576501550
Los Angeles RamsLos Angeles Rams201716371323494748.032418401317100
Miami DolphinsMiami Dolphins201416378720499139.021114299213111
Oakland RaidersOakland Raiders20131638082331,04138.0260983119132
Tampa Bay BuccaneersTampa Bay Buccaneers201216376719996627.01931841931180
Chicago BearsChicago Bears20071638931821,07541.024516235125170
New Orleans SaintsNew Orleans Saints20021638722261,09839.025320211122182
Baltimore RavensBaltimore Ravens20021639022291,13133.02322544921361
Oakland RaidersOakland Raiders200016343.0278213234161
Tampa Bay BuccaneersTampa Bay Buccaneers200016355.0332252754161
Dallas CowboysDallas Cowboys199116323.0151121672111
Atlanta FalconsAtlanta Falcons199116329.0237192251164
StatMuse has team, season-level data for punts blocked going back to the 1950 season.