NYS Counties with highest rate of COVID-19 per week

NYS Counties with the most COVID-19 positive test results per 100K residents
From	To	County	New Positives per 100K people	Actual New Positives	% Tests Positive
3/1/2020	3/7/2020	Westchester	4	42	25.77%
3/8/2020	3/14/2020	Westchester	14	140	10.56%
3/15/2020	3/21/2020	Westchester	170	1691	18.46%
3/22/2020	3/28/2020	Westchester	671	6646	30.39%
3/29/2020	4/4/2020	Rockland	919	3117	50.45%
4/5/2020	4/11/2020	Rockland	706	2395	44.06%
4/12/2020	4/18/2020	Bronx	534	7382	43.35%
4/19/2020	4/25/2020	Rockland	558	1892	29.92%
4/26/2020	5/2/2020	Bronx	285	3946	19.97%
5/3/2020	5/9/2020	Sullivan	178	142	17.44%
5/10/2020	5/16/2020	Sullivan	173	138	15.66%
5/17/2020	5/23/2020	Sullivan	99	79	8.08%
5/24/2020	5/30/2020	Sullivan	96	77	5.72%
5/31/2020	6/6/2020	Orleans	66	26	3.12%
6/7/2020	6/13/2020	Oneida	56	130	1.74%
6/14/2020	6/20/2020	Oneida	52	120	2.14%
6/21/2020	6/27/2020	Oneida	84	193	2.69%
6/28/2020	7/4/2020	Oneida	68	156	2.75%
7/5/2020	7/11/2020	Onondaga	37	175	1.8%
7/12/2020	7/18/2020	Oneida	51	117	2.04%
7/19/2020	7/25/2020	Broome	48	95	1.86%
7/26/2020	8/1/2020	Ulster	56	103	2.18%
8/2/2020	8/8/2020	Herkimer	55	33	1.59%
8/9/2020	8/15/2020	Hamilton	58	3	3.61%
8/16/2020	8/22/2020	Essex	111	41	4.78%
8/23/2020	8/29/2020	Essex	75	28	2.62%
8/30/2020	9/5/2020	Otsego	206	125	5.03%
9/6/2020	9/12/2020	Otsego	75	46	2.59%
9/13/2020	9/19/2020	Chemung	97	79	2.32%
9/20/2020	9/26/2020	Chemung	160	131	3.53%
9/27/2020	10/3/2020	Chemung	319	260	6.47%
10/4/2020	10/10/2020	Chemung	291	237	5.03%
10/11/2020	10/17/2020	Chemung	351	286	5.83%
10/18/2020	10/24/2020	Chemung	486	396	6.36%
10/25/2020	10/31/2020	Tioga	265	127	4.92%
11/1/2020	11/7/2020	Chemung	336	274	5.3%
11/8/2020	11/14/2020	Allegany	374	175	6.64%
11/15/2020	11/21/2020	Allegany	432	202	3.49%
11/22/2020	11/28/2020	Chemung	492	401	5.99%
11/29/2020	12/5/2020	Oneida	615	1409	7.65%
12/6/2020	12/12/2020	Oneida	687	1574	9.14%
12/13/2020	12/19/2020	Genesee	763	439	10.51%
12/20/2020	12/26/2020	Genesee	719	414	11.87%
12/27/2020	1/2/2021	Herkimer	941	563	11.9%
1/3/2021	1/9/2021	Herkimer	1054	631	13.28%
1/10/2021	1/16/2021	Lewis	880	235	13.78%
1/17/2021	1/23/2021	Lewis	726	194	11.65%
1/24/2021	1/30/2021	Hamilton	937	48	13.15%
1/31/2021	2/6/2021	Hamilton	722	37	9.3%
2/7/2021	2/13/2021	Bronx	480	6631	6.36%
2/14/2021	2/20/2021	Bronx	375	5180	5.8%
2/21/2021	2/27/2021	Bronx	387	5345	5.2%
2/28/2021	3/6/2021	Richmond	402	1978	4.48%
3/7/2021	3/13/2021	Richmond	381	1875	4.77%
3/14/2021	3/20/2021	Richmond	424	2084	4.57%
3/21/2021	3/27/2021	Richmond	424	2086	4.83%
3/28/2021	4/3/2021	Richmond	446	2195	5.2%
4/4/2021	4/10/2021	Richmond	443	2177	4.64%
4/11/2021	4/17/2021	Erie	354	3371	5.46%
4/18/2021	4/24/2021	Richmond	265	1306	3.04%
4/25/2021	5/1/2021	Lewis	213	57	4.77%
5/2/2021	5/8/2021	Lewis	273	73	6.87%
5/9/2021	5/15/2021	Lewis	288	77	6.72%
5/16/2021	5/22/2021	Lewis	183	49	4.54%
5/23/2021	5/29/2021	Cortland	106	49	2.05%
5/30/2021	6/5/2021	Lewis	63	17	2%
6/6/2021	6/12/2021	Schuyler	45	8	1.5%
6/13/2021	6/19/2021	Schuyler	45	8	2.08%
6/20/2021	6/26/2021	Hamilton	39	2	1.27%
6/27/2021	7/3/2021	Richmond	49	242	1.36%
7/4/2021	7/10/2021	Richmond	48	236	1.42%
7/11/2021	7/17/2021	Richmond	72	355	1.88%
7/18/2021	7/24/2021	Richmond	105	520	2.42%
7/25/2021	7/31/2021	Richmond	157	775	3.25%
8/1/2021	8/7/2021	Richmond	216	1064	3.57%
8/8/2021	8/14/2021	Richmond	255	1253	3.71%
8/15/2021	8/21/2021	Cayuga	310	237	6.53%
8/22/2021	8/28/2021	Fulton	343	181	8.28%
8/29/2021	9/4/2021	Franklin	368	171	6.93%
9/5/2021	9/11/2021	Hamilton	508	26	11.21%
9/12/2021	9/18/2021	Franklin	461	214	7.37%
9/19/2021	9/25/2021	Chemung	488	398	6.8%
9/26/2021	10/2/2021	Fulton	562	296	10.24%
10/3/2021	10/9/2021	Chemung	583	475	7.72%
10/10/2021	10/16/2021	Chemung	585	477	7.81%
10/17/2021	10/23/2021	Fulton	387	204	7.35%
10/24/2021	10/30/2021	Allegany	494	231	9.23%
10/31/2021	11/6/2021	Allegany	593	277	11.47%
11/7/2021	11/13/2021	Washington	729	444	11.02%
11/14/2021	11/20/2021	Washington	930	566	13.32%
11/21/2021	11/27/2021	Washington	641	390	12.33%
11/28/2021	12/4/2021	Orleans	826	325	13.4%
12/5/2021	12/11/2021	Orleans	679	267	11.14%
12/12/2021	12/18/2021	Tompkins	1855	1944	6.62%
12/19/2021	12/25/2021	New_York	2548	40700	10.5%
12/26/2021	1/1/2022	Richmond	3418	16791	22.84%
1/2/2022	1/8/2022	Bronx	3853	53172	24.77%
1/9/2022	1/15/2022	Queens	2650	60369	17.63%
1/16/2022	1/22/2022	Clinton	1267	998	18.84%
1/23/2022	1/29/2022	Clinton	1136	895	16.24%
1/30/2022	2/5/2022	Clinton	755	595	11.85%
2/6/2022	2/12/2022	Clinton	561	442	9.61%
2/13/2022	2/19/2022	Clinton	364	287	7.89%
2/20/2022	2/26/2022	Clinton	203	160	5.9%
2/27/2022	3/5/2022	Franklin	241	112	5.99%
3/6/2022	3/12/2022	Franklin	178	83	4.46%
3/13/2022	3/19/2022	Franklin	226	105	6.25%
3/20/2022	3/26/2022	Tompkins	456	478	5.6%
3/27/2022	4/2/2022	Oswego	404	478	11.55%
4/3/2022	4/9/2022	Oswego	487	577	14.12%
4/10/2022	4/16/2022	Oswego	449	532	15.82%
4/17/2022	4/23/2022	Oneida	433	991	9.8%
4/24/2022	4/30/2022	Erie	467	4445	19.04%
5/1/2022	5/7/2022	Tompkins	512	537	8.65%
5/8/2022	5/14/2022	Nassau	457	6324	11.57%
5/15/2022	5/21/2022	Warren	455	299	12.42%
5/22/2022	5/28/2022	New_York	375	5990	6.91%
5/29/2022	6/4/2022	New_York	292	4664	6.09%
6/5/2022	6/11/2022	New_York	352	5633	5.82%
6/12/2022	6/18/2022	New_York	286	4571	5.71%
6/19/2022	6/25/2022	New_York	297	4744	6.72%
6/26/2022	7/2/2022	New_York	325	5204	8.43%
7/3/2022	7/9/2022	New_York	348	5566	9.15%
7/10/2022	7/16/2022	Queens	402	9176	11.28%
7/17/2022	7/23/2022	Queens	351	7997	10.88%
7/24/2022	7/30/2022	Queens	305	6956	10.16%
7/24/2022	7/30/2022	Richmond	305	1500	10.17%
7/31/2022	8/6/2022	Queens	296	6748	9.81%
8/7/2022	8/13/2022	Richmond	255	1254	8.19%
8/14/2022	8/20/2022	Fulton	216	114	12.39%
8/21/2022	8/27/2022	Chenango	238	111	13.75%
8/28/2022	9/3/2022	Tompkins	186	195	11.25%
9/4/2022	9/10/2022	Cortland	199	92	12.37%
9/11/2022	9/17/2022	Fulton	260	137	12.43%
9/18/2022	9/24/2022	Fulton	311	164	13.23%
9/25/2022	10/1/2022	Fulton	258	136	12.26%
10/2/2022	10/8/2022	Fulton	301	159	15.87%
10/9/2022	10/15/2022	Oswego	219	260	13.01%
10/16/2022	10/22/2022	Warren	190	125	8.06%
10/23/2022	10/29/2022	Nassau	176	2442	8.14%
10/30/2022	11/5/2022	Hamilton	293	15	26.79%
11/6/2022	11/12/2022	Queens	185	4219	7.73%
11/13/2022	11/19/2022	New_York	188	3011	6.54%
11/20/2022	11/26/2022	Nassau	178	2474	8.81%
11/27/2022	12/3/2022	Nassau	293	4066	9.91%
12/4/2022	12/10/2022	Suffolk	305	4654	10.69%
12/11/2022	12/17/2022	Nassau	300	4162	10.39%
12/18/2022	12/24/2022	Nassau	307	4256	11.23%
12/25/2022	12/31/2022	Suffolk	249	3801	12.05%
1/1/2023	1/7/2023	Orange	254	1035	8.7%
1/8/2023	1/14/2023	Orange	197	800	7.62%
1/15/2023	1/21/2023	Orange	171	698	6.69%
1/22/2023	1/28/2023	Sullivan	165	132	8.36%
1/29/2023	2/4/2023	Greene	189	91	23.51%
2/5/2023	2/11/2023	Clinton	162	128	10.66%
2/12/2023	2/18/2023	Cortland	171	79	11.48%
2/19/2023	2/25/2023	Cortland	175	81	10.89%
2/26/2023	3/4/2023	Clinton	139	110	8.89%
3/5/2023	3/11/2023	Franklin	140	65	10.83%
3/12/2023	3/18/2023	Seneca	103	34	7.51%
3/19/2023	3/25/2023	Hamilton	117	6	13.33%
3/26/2023	4/1/2023	Wayne	73	67	5.79%
4/2/2023	4/8/2023	Wayne	87	80	6.68%
4/9/2023	4/15/2023	Wayne	58	53	4.92%
4/16/2023	4/22/2023	Rockland	99	338	0.59%
4/23/2023	4/29/2023	Rockland	84	285	0.96%
4/30/2023	5/6/2023	Otsego	34	21	26.92%
5/7/2023	5/13/2023	New_York	27	439	2.29%
5/14/2023	5/20/2023	Franklin	36	17	7.23%
5/21/2023	5/27/2023	Franklin	36	17	10%
5/28/2023	6/3/2023	Rockland	23	80	5.33%
5/28/2023	6/3/2023	Westchester	23	233	6.04%
6/4/2023	6/10/2023	Sullivan	21	17	8.59%
6/11/2023	6/17/2023	Jefferson	21	25	5.25%
6/18/2023	6/24/2023	Steuben	26	25	15.06%
6/25/2023	7/1/2023	Genesee	24	14	16.47%
7/2/2023	7/8/2023	Chenango	25	12	6.28%
7/2/2023	7/8/2023	Tioga	25	12	54.55%
7/9/2023	7/15/2023	New_York	26	416	8.43%
7/16/2023	7/22/2023	Sullivan	28	23	14.02%
7/23/2023	7/29/2023	Warren	44	29	27.36%
7/30/2023	8/5/2023	Nassau	51	714	15.95%
8/6/2023	8/12/2023	Delaware	49	22	61.11%
8/13/2023	8/19/2023	Delaware	58	26	42.62%
8/20/2023	8/26/2023	Delaware	93	42	48.84%
8/27/2023	9/2/2023	Broome	114	226	62.26%
9/3/2023	9/9/2023	Suffolk	141	2161	100%
9/10/2023	9/16/2023	Nassau	156	2163	100%
9/17/2023	9/23/2023	Montgomery	179	89	100%
9/24/2023	9/30/2023	Montgomery	219	109	100%
10/1/2023	10/7/2023	Washington	162	99	100%
10/8/2023	10/14/2023	Washington	128	78	100%
10/15/2023	10/21/2023	Genesee	133	77	100%
10/22/2023	10/28/2023	Hamilton	136	7	100%
10/29/2023	11/4/2023	Cortland	106	49	100%
11/5/2023	11/11/2023	Chemung	121	99	100%
11/12/2023	11/18/2023	Chemung	117	96	100%
11/19/2023	11/25/2023	Steuben	131	122	100%
11/26/2023	12/2/2023	Washington	193	118	100%
12/3/2023	12/9/2023	Sullivan	193	154	100%
12/10/2023	12/16/2023	Clinton	290	229	100%
12/17/2023	12/23/2023	Schuyler	294	52	100%
12/24/2023	12/30/2023	Suffolk	344	5255	100%
12/31/2023	1/6/2024	Nassau	344	4769	100%
1/7/2024	1/13/2024	Lewis	374	100	100%
1/14/2024	1/20/2024	Sullivan	223	178	100%
1/21/2024	1/27/2024	Sullivan	210	168	100%
1/28/2024	2/3/2024	Suffolk	161	2458	100%
2/4/2024	2/10/2024	Sullivan	178	142	100%
2/11/2024	2/17/2024	Seneca	145	48	100%
2/18/2024	2/24/2024	Sullivan	128	102	100%
2/25/2024	3/2/2024	Sullivan	118	94	100%
3/3/2024	3/9/2024	Sullivan	70	56	100%
3/10/2024	3/16/2024	Sullivan	74	59	100%
3/17/2024	3/23/2024	Sullivan	50	40	100%
3/24/2024	3/30/2024	Jefferson	53	62	100%
3/31/2024	4/6/2024	Chemung	54	44	100%
4/7/2024	4/13/2024	Franklin	40	19	100%
4/14/2024	4/20/2024	Jefferson	38	45	100%
4/21/2024	4/27/2024	Sullivan	36	29	100%
4/28/2024	5/4/2024	Ulster	32	59	100%
5/5/2024	5/11/2024	Ulster	34	62	100%
5/12/2024	5/18/2024	Nassau	35	490	100%
5/12/2024	5/18/2024	New_York	35	562	100%
5/19/2024	5/25/2024	Allegany	64	30	100%
5/26/2024	6/1/2024	Nassau	47	662	100%
6/2/2024	6/8/2024	New_York	55	892	100%
6/9/2024	6/15/2024	Bronx	61	842	100%
6/16/2024	6/22/2024	Westchester	73	727	100%
6/23/2024	6/29/2024	Westchester	79	791	100%
6/30/2024	7/6/2024	Nassau	96	1341	100%
7/7/2024	7/13/2024	Nassau	111	1548	100%
7/14/2024	7/20/2024	Nassau	129	1796	100%
7/21/2024	7/27/2024	Nassau	139	1935	100%
7/28/2024	8/3/2024	Suffolk	114	1745	100%
8/4/2024	8/10/2024	Jefferson	141	165	100%
8/11/2024	8/17/2024	Tioga	113	54	100%
8/18/2024	8/24/2024	Chenango	126	59	100%
8/25/2024	8/31/2024	Broome	135	268	100%
8/25/2024	8/31/2024	Franklin	135	63	100%
9/1/2024	9/7/2024	Tioga	146	70	100%
9/8/2024	9/14/2024	Tioga	190	91	100%
9/15/2024	9/21/2024	Cortland	214	99	100%
9/22/2024	9/28/2024	Chenango	142	66	100%
9/29/2024	10/5/2024	Chenango	131	61	100%
10/6/2024	10/12/2024	Chenango	73	34	100%
10/13/2024	10/19/2024	Genesee	57	33	100%
10/20/2024	10/26/2024	Livingston	60	37	100%
10/27/2024	11/2/2024	Tioga	77	37	100%
11/3/2024	11/9/2024	Franklin	47	22	100%
11/10/2024	11/16/2024	Oneida	41	94	100%
11/17/2024	11/23/2024	Oneida	55	128	100%
11/24/2024	11/30/2024	Herkimer	80	48	100%
12/1/2024	12/7/2024	Hamilton	78	4	100%
12/8/2024	12/14/2024	Fulton	58	31	100%
12/15/2024	12/21/2024	Montgomery	92	46	100%
12/22/2024	12/28/2024	Putnam	87	86	100%
12/29/2024	1/4/2025	Herkimer	125	75	100%
1/5/2025	1/11/2025	Hamilton	97	5	100%
1/12/2025	1/18/2025	Sullivan	97	78	100%
1/19/2025	1/25/2025	Sullivan	121	97	100%
1/26/2025	2/1/2025	Montgomery	92	46	100%
2/2/2025	2/8/2025	Putnam	83	82	100%
2/9/2025	2/15/2025	Nassau	72	997	100%
2/9/2025	2/15/2025	Suffolk	72	1099	100%
2/16/2025	2/22/2025	Richmond	64	318	100%
2/23/2025	3/1/2025	Richmond	61	301	100%
3/2/2025	3/8/2025	Sullivan	80	64	100%
3/9/2025	3/15/2025	Seneca	112	37	100%
3/16/2025	3/22/2025	Nassau	74	1026	100%
3/23/2025	3/29/2025	Nassau	76	1057	100%
3/30/2025	4/5/2025	Nassau	77	1067	100%
4/6/2025	4/12/2025	Nassau	71	983	100%
4/13/2025	4/19/2025	Nassau	53	746	100%
4/20/2025	4/26/2025	Nassau	52	725	100%
4/27/2025	5/3/2025	Nassau	36	510	100%
4/27/2025	5/3/2025	Suffolk	36	553	100%
5/4/2025	5/10/2025	Nassau	28	398	100%

Week with most COVID-19 positive test results, by county
County	From	To	New Positives per 100K people	Actual New Positives	% Tests Positive
Albany	1/2/2022	1/8/2022	1489	4704	19.76%
Allegany	1/9/2022	1/15/2022	762	356	13.84%
Bronx	1/2/2022	1/8/2022	3853	53172	24.77%
Broome	1/2/2022	1/8/2022	1485	2929	18.64%
Cattaraugus	1/16/2022	1/22/2022	1130	864	16.88%
Cayuga	1/2/2022	1/8/2022	1546	1182	17.19%
Chautauqua	1/2/2022	1/8/2022	1030	1299	20.04%
Chemung	1/9/2022	1/15/2022	2109	1718	18.07%
Chenango	1/2/2022	1/8/2022	1229	571	15.22%
Clinton	1/9/2022	1/15/2022	1881	1482	21.49%
Columbia	1/9/2022	1/15/2022	1275	782	20.47%
Cortland	1/2/2022	1/8/2022	1552	716	16.33%
Delaware	1/2/2022	1/8/2022	1294	579	21.64%
Dutchess	1/2/2022	1/8/2022	2013	5991	22.88%
Erie	1/2/2022	1/8/2022	1919	18241	23.27%
Essex	1/2/2022	1/8/2022	1097	405	12.46%
Franklin	1/2/2022	1/8/2022	1181	548	14.57%
Fulton	1/9/2022	1/15/2022	1405	740	20.33%
Genesee	1/9/2022	1/15/2022	1666	959	22.08%
Greene	1/9/2022	1/15/2022	1306	628	18.66%
Hamilton	1/2/2022	1/8/2022	1426	73	13.59%
Herkimer	1/2/2022	1/8/2022	1392	833	17.58%
Jefferson	1/9/2022	1/15/2022	1304	1521	20.75%
Kings	1/2/2022	1/8/2022	3085	79933	19.76%
Lewis	1/9/2022	1/15/2022	1288	344	18.74%
Livingston	1/9/2022	1/15/2022	1277	786	19.82%
Madison	1/2/2022	1/8/2022	1199	805	15.83%
Monroe	1/2/2022	1/8/2022	1516	11404	20.61%
Montgomery	1/2/2022	1/8/2022	1761	874	21.85%
Nassau	1/2/2022	1/8/2022	3025	41859	25.29%
New_York	1/2/2022	1/8/2022	3008	48032	16.58%
Niagara	1/2/2022	1/8/2022	1873	3951	22.01%
Oneida	1/2/2022	1/8/2022	1514	3465	16.92%
Onondaga	1/2/2022	1/8/2022	2337	10945	24.09%
Ontario	1/2/2022	1/8/2022	1172	1321	19.03%
Orange	1/2/2022	1/8/2022	2571	10437	27.2%
Orleans	1/9/2022	1/15/2022	1533	603	22.45%
Oswego	1/2/2022	1/8/2022	1478	1749	23.6%
Otsego	1/2/2022	1/8/2022	1281	777	15.33%
Putnam	12/26/2021	1/1/2022	2525	2476	18.86%
Queens	1/2/2022	1/8/2022	3703	84362	23.89%
Rensselaer	1/2/2022	1/8/2022	1639	2621	18.93%
Richmond	1/2/2022	1/8/2022	3654	17946	22.93%
Rockland	1/2/2022	1/8/2022	2770	9391	20.16%
Saratoga	1/2/2022	1/8/2022	1741	4159	21.15%
Schenectady	1/2/2022	1/8/2022	1737	2781	18.93%
Schoharie	1/9/2022	1/15/2022	1177	354	18.38%
Schuyler	1/9/2022	1/15/2022	1461	258	15.31%
Seneca	1/9/2022	1/15/2022	1374	452	19.66%
St_Lawrence	1/9/2022	1/15/2022	1004	1082	13.45%
Steuben	1/9/2022	1/15/2022	1251	1159	12.99%
Suffolk	1/2/2022	1/8/2022	2655	40503	26.67%
Sullivan	1/2/2022	1/8/2022	2522	2009	24.97%
Tioga	1/9/2022	1/15/2022	1423	680	17.99%
Tompkins	12/12/2021	12/18/2021	1855	1944	6.62%
Ulster	1/2/2022	1/8/2022	1299	2370	19.2%
Warren	1/2/2022	1/8/2022	1809	1187	18.2%
Washington	1/9/2022	1/15/2022	1469	894	16.34%
Wayne	1/9/2022	1/15/2022	1214	1107	17.92%
Westchester	1/2/2022	1/8/2022	2562	25379	22.78%
Wyoming	1/2/2022	1/8/2022	1351	540	23.19%
Yates	1/9/2022	1/15/2022	957	234	15.31%

Data based on New York State Department of Health data. Note that early in the pandemic (and often later), large numbers of cases happened but were not detected. Since 8/30/2023, data no longer reports total number of tests. Population estimates from 2022 census estimates.