In the nineteen counties which have made district-level results publically available, there are a total of 232 'shut-out' districts - 13 in [Campden County][1], 128 in [Essex County][2], 1 in [Gloucester County][3], 40 in [Hudson County][4], 11 in [Mercer County][5], 8 in [Middlesex County][6], 14 in [Passaic County][7], and 17 in [Union County][8]. 

In [Atlantic][9], [Bergen][10], [Cape May][11], [Cumberland][12], [Hunterdon][13], [Monmouth][14], [Morris][15], [Ocean][16], [Salem][17], [Somerset][18], and [Sussex][19] counties, every district returned at least one vote in the Republican primary.

Two counties have not made district-level results available - these are Burlington and Warren Counties.

A full list of 'shut-out' districts in the eight counties above follows.

    ---- CAMPDEN COUNTY ----
    Camden City W1 D7
    Camden City W1 D10
    Camden City W2 D3
    Camden City W2 D7
    Camden City W2 D10
    Camden City W2 D11
    Camden City W3 D5
    Camden City W3 D7
    Camden City W3 D9
    Camden City W4 D1
    Lindenwold Dist 7
    Pine Valley Dist 1
    Tavistock Dist 1
    
    ---- ESSEX COUNTY ----
    Bloomfield 2-3
    Bloomfield 3-7
    East Orange 1-1
    East Orange 1-4
    East Orange 1-5
    East Orange 1-9
    East Orange 1-10
    East Orange 2-2
    East Orange 2-3
    East Orange 2-4
    East Orange 2-7
    East Orange 2-10
    East Orange 2-11
    East Orange 3-2
    East Orange 3-4
    East Orange 3-5
    East Orange 3-6
    East Orange 3-9
    East Orange 3-11
    East Orange 3-12
    East Orange 3-14
    East Orange 4-1
    East Orange 4-2
    East Orange 4-4
    East Orange 4-6
    East Orange 4-7
    East Orange 4-13
    East Orange 5-4
    East Orange 5-7
    East Orange 5-8
    East Orange 5-9
    East Orange 5-12
    East Orange 5-13
    Essex Fells 2
    Irvington N-4
    Irvington N-5
    Irvington N-6
    Irvington N-7
    Irvington N-8
    Irvington N-9
    Irvington S-3
    Irvington S-5
    Irvington S-7
    Irvington S-8
    Irvington S-9
    Irvington S-10
    Irvington S-11
    Irvington E-2
    Irvington E-4
    Irvington E-8
    Irvington W-1
    Irvington W-2
    Irvington W-4
    Irvington W-6
    Maplewood 14
    Millburn 15
    Montclair 3-4
    Newark N-12
    Newark N-25
    Newark N-38
    Newark S-1
    Newark S-4
    Newark S-8
    Newark S-11
    Newark S-13
    Newark S-17
    Newark S-18
    Newark S-19
    Newark S-20
    Newark S-22
    Newark S-23
    Newark S-24
    Newark S-25
    Newark S-29
    Newark S-30
    Newark S-32
    Newark S-35
    Newark S-37
    Newark S-38
    Newark S-41
    Newark S-42
    Newark S-46
    Newark S-47
    Newark S-48
    Newark E-13
    Newark E-18
    Newark E-29
    Newark W-6
    Newark W-7
    Newark W-10
    Newark W-15
    Newark W-20
    Newark W-22
    Newark W-23
    Newark W-27
    Newark W-28
    Newark W-29
    Newark W-30
    Newark W-31
    Newark W-32
    Newark W-33
    Newark W-34
    Newark W-37
    Newark W-38
    Newark W-39
    Newark W-41
    Newark W-43
    Newark W-46
    Newark W-47
    Newark C-4
    Newark C-5
    Newark C-6
    Newark C-7
    Newark C-12
    Newark C-17
    Newark C-22
    Newark C-28
    Newark C-39
    Newark C-40
    Newark C-42
    Newark C-49
    North Caldwell 2
    Nutley 3-6
    Orange E-1
    Orange W-5
    Orange W-6
    South Orange 8
    West Orange 1-3
    
    ---- GLOUCESTER COUNTY ----
    Glassboro District 2
    
    ---- HUDSON COUNTY ----
    East Newark Ward 1 District 1
    East Newark Ward 1 District 2
    Harrison Ward 4 District 1
    Hoboken Ward 3 District 7
    Hoboken Ward 4 District 5
    Jersey City Ward A District 4
    Jersey City Ward A District 13
    Jersey City Ward A District 16
    Jersey City Ward A District 19
    Jersey City Ward A District 22
    Jersey City Ward A District 31
    Jersey City Ward A District 32
    Jersey City Ward A District 33
    Jersey City Ward B District 11
    Jersey City Ward B District 14
    Jersey City Ward B District 15
    Jersey City Ward B District 26
    Jersey City Ward C District 6
    Jersey City Ward E District 2
    Jersey City Ward E District 5
    Jersey City Ward E District 11
    Jersey City Ward F District 3
    Jersey City Ward F District 5
    Jersey City Ward F District 7
    Jersey City Ward F District 8
    Jersey City Ward F District 11
    Jersey City Ward F District 12
    Jersey City Ward F District 13
    Jersey City Ward F District 14
    Jersey City Ward F District 16
    Jersey City Ward F District 17
    Jersey City Ward F District 18
    Jersey City Ward F District 19
    Jersey City Ward F District 20
    Jersey City Ward F District 24
    Jersey City Ward F District 26
    Jersey City Ward F District 29
    North Bergen Ward 3 District 5
    West New York Ward 2 District 6
    West New York Ward 3 District 11
    
    ---- MERCER COUNTY ----
    Trenton North 11
    Trenton North 12
    Trenton South 2
    Trenton East 1
    Trenton East 2
    Trenton West 1
    Trenton West 9
    Trenton West 12
    Trenton West 13
    Trenton West 15
    Trenton West 16

    ---- MIDDLESEX COUNTY ----
    New Brunswick W4 D3
    New Brunswick W5 D2
    New Brunswick W6 D3
    Perth Amboy W4 D2    
    Perth Amboy W6 D6
    Piscataway W3 D6
    Piscataway W4 D4
    Piscataway W4 D6

    ---- PASSAIC COUNTY ----
    Little Falls 9
    Passaic W2 D7
    Passaic W2 D8
    Passaic W4 D7
    Paterson W1 D1
    Paterson W1 D4
    Paterson W1 D2
    Paterson W3 D1
    Paterson W3 D2
    Paterson W3 D9
    Paterson W4 D6
    Paterson W4 D10
    Paterson W5 D1
    Paterson W5 D3
    
    ---- UNION COUNTY ----
    Elizabeth Ward 1 District 1
    Elizabeth Ward 1 District 8
    Hillside Ward 3 District 1
    Hillside Ward 4 District 4
    Linden Ward 4 District 1
    Linden Ward 4 District 2
    Linden Ward 4 District 3
    Linden Ward 5 District 4
    Plainfield Ward 1 District 5
    Plainfield Ward 1 District 6
    Plainfield Ward 1 District 7
    Plainfield Ward 3 District 5
    Plainfield Ward 4 District 1
    Plainfield Ward 4 District 3
    Plainfield Ward 4 District 4
    Rahway Ward 3 District 5
    Union District 8


  [1]: https://www.camdencounty.com/wp-content/elections/primary2021/ContestBreakdown.pdf
  [2]: https://results.enr.clarityelections.com/NJ/Essex/109583/web.276935
  [3]: https://results.enr.clarityelections.com/NJ/Gloucester/109587/web.276935
  [4]: https://results.enr.clarityelections.com/NJ/Hudson/109797/web.276935
  [5]: https://results.enr.clarityelections.com/NJ/Mercer/109796/web.276935
  [6]: http://www.middlesexcountynj.gov/Government/Pages/Live-Election-Results.aspx
  [7]: https://www.passaiccountynj.org/Election%20Results/2021/PrimarySOV_01.pdf
  [8]: https://results.enr.clarityelections.com/NJ/Union/109795/web.276935
  [9]: https://results.enr.clarityelections.com/NJ/Atlantic/109581/web.276935
  [10]: https://www.bergencountyclerk.org/_Content/pdf/ElectionResult/Print%20SOV%20Report%20w_%20VBMs(1).pdf
  [11]: https://results.enr.clarityelections.com/NJ/Cape_May/109965/web.276935
  [12]: https://results.enr.clarityelections.com/NJ/Cumberland/109582/web.276935
  [13]: https://www.co.hunterdon.nj.us/election/2021/primary/Official%20Municipality%20P2021.pdf
  [14]: https://results.enr.clarityelections.com/NJ/Monmouth/109963/web.276935
  [15]: https://results.enr.clarityelections.com/NJ/Morris/109588/web.276935
  [16]: https://results.enr.clarityelections.com/NJ/Ocean/109584/web.276935
  [17]: https://salemcountyclerk.org/wp-content/uploads/2021/06/Salem-County_StatementOfVotesCast_Corrected-min.pdf
  [18]: https://results.enr.clarityelections.com/NJ/Somerset/109590/web.276935
  [19]: https://sussexcountyclerk.org/wp-content/uploads/2021/06/OFFICIAL-DISTRICT-SUMMARY.html