| National Gallery __ | 19 |
| National Gallery ___ | 20 |
| National gemstone of Australia | 30 |
| National Geographic e.g. | 28 |
| National Geographic Bee host | 28 |
| National Geographic Bee reference | 33 |
| National Geographic inserts | 27 |
| National Geographic's first natural one appeared in 1914 | 60 |
| National Geography Bee host | 27 |
| National grp. since 1897 that elected its first male head in 2009 | 65 |
| National Guard activity | 23 |
| National Guard building | 23 |
| National Guard buildings | 24 |
| National Guard center | 21 |
| National Guard challenges | 25 |
| National Guard concern | 22 |
| National Guard hangout | 22 |
| National Guard of the U.S. | 26 |
| National Guard outpost | 22 |
| National Guard soldiers | 23 |
| National Hamburger Month | 24 |
| National head count | 19 |
| National headquarters of J.C. Penney, Dr Pepper and Frito-Lay | 61 |
| National hero | 13 |
| National hero of Argentina | 26 |
| National hero of Hungary | 24 |
| National hero of Spain | 22 |
| National highway | 16 |
| National Historic Landmark designated 3/27/06 | 45 |
| National Historic Landmark in Manhattan | 39 |
| National historical park in Alaska | 34 |
| National home of many elite marathoners | 39 |
| National HS exam | 16 |
| National Humor Mo. | 18 |
| National Iced Tea Month | 23 |
| National Immunization Program org. | 34 |
| National Impotency mo. | 22 |
| National income source? | 23 |
| National Institutes of Health city | 34 |
| National Institutes of Health headquarters | 42 |
| National Institutes of Health home | 34 |
| National Institutes of Health location | 38 |
| National instruments of Guatemala | 33 |
| National interest | 17 |
| National Inventors' Day is observed on his birthday | 55 |
| National Junior Tennis League co-founder | 40 |
| National language of Pakistan | 29 |
| National leader | 15 |
| National leader from Georgia | 28 |
| National leader? | 16 |
| National leaders | 16 |
| National League career home run king for more than 28 years | 59 |
| National League city: Abbr. | 27 |
| National League division | 24 |
| National League East player | 27 |
| National League East stadium | 28 |
| National League East team | 25 |
| National League entry | 21 |
| National League M.V.P.: 1971 | 28 |
| National League manager | 23 |
| National League nine | 20 |
| National League park | 20 |
| National League player | 22 |
| National League squad | 21 |
| National League stadium | 23 |
| National League team | 20 |
| National League's M.V.P. in 1954 | 36 |
| National League's MVP of 1998 | 33 |
| National League's Warren | 28 |
| National Leaguer | 16 |
| National Leaguer since '62 | 30 |
| National Leaguer since 1965 | 27 |
| National Leaguer who was ranked first, second, or third in walks every year from 1929 to 1944 | 93 |
| National Leaguers | 17 |
| National loafers? | 17 |
| National Mall liners | 20 |
| National Mall shade providers | 29 |
| National Mall shaders | 21 |
| National Mall sight | 19 |
| National Mall trees | 19 |
| National men's org. | 23 |
| National Merit Scholarship hurdle | 33 |
| National monogram | 17 |
| National monument dedicated 10/28/1886 | 38 |
| National monument in Alaska | 27 |
| National monument near Flagstaff | 32 |
| National monument site since 1965 | 33 |
| National motto | 14 |
| National Museum of Afghanistan city | 35 |
| National Museum of Finland site | 31 |
| National Museum of Indonesia setting | 36 |
| National Museum of Western Art city | 35 |
| National name on some euros | 27 |
| National Naval Medical Center location | 38 |
| National Naval Medical Center setting | 37 |
| National nickname | 17 |
| National No Socks Day month | 27 |
| National observance | 19 |
| National opener | 15 |
| National opener? | 16 |